3 * Global functions used everywhere.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
23 if ( !defined( 'MEDIAWIKI' ) ) {
24 die( "This file is part of MediaWiki, it is not a valid entry point" );
27 use Liuggio\StatsdClient\StatsdClient
;
28 use Liuggio\StatsdClient\Sender\SocketSender
;
29 use MediaWiki\Logger\LoggerFactory
;
31 // Hide compatibility functions from Doxygen
35 * Compatibility functions
37 * We support PHP 5.3.3 and up.
38 * Re-implementations of newer functions or functions in non-standard
39 * PHP extensions may be included here.
42 if ( !function_exists( 'mb_substr' ) ) {
45 * @see Fallback::mb_substr
48 function mb_substr( $str, $start, $count = 'end' ) {
49 return Fallback
::mb_substr( $str, $start, $count );
54 * @see Fallback::mb_substr_split_unicode
57 function mb_substr_split_unicode( $str, $splitPos ) {
58 return Fallback
::mb_substr_split_unicode( $str, $splitPos );
62 if ( !function_exists( 'mb_strlen' ) ) {
65 * @see Fallback::mb_strlen
68 function mb_strlen( $str, $enc = '' ) {
69 return Fallback
::mb_strlen( $str, $enc );
73 if ( !function_exists( 'mb_strpos' ) ) {
76 * @see Fallback::mb_strpos
79 function mb_strpos( $haystack, $needle, $offset = 0, $encoding = '' ) {
80 return Fallback
::mb_strpos( $haystack, $needle, $offset, $encoding );
84 if ( !function_exists( 'mb_strrpos' ) ) {
87 * @see Fallback::mb_strrpos
90 function mb_strrpos( $haystack, $needle, $offset = 0, $encoding = '' ) {
91 return Fallback
::mb_strrpos( $haystack, $needle, $offset, $encoding );
95 // gzdecode function only exists in PHP >= 5.4.0
96 // http://php.net/gzdecode
97 if ( !function_exists( 'gzdecode' ) ) {
100 * @param string $data
103 function gzdecode( $data ) {
104 return gzinflate( substr( $data, 10, -8 ) );
108 // hash_equals function only exists in PHP >= 5.6.0
109 // http://php.net/hash_equals
110 if ( !function_exists( 'hash_equals' ) ) {
112 * Check whether a user-provided string is equal to a fixed-length secret string
113 * without revealing bytes of the secret string through timing differences.
115 * The usual way to compare strings (PHP's === operator or the underlying memcmp()
116 * function in C) is to compare corresponding bytes and stop at the first difference,
117 * which would take longer for a partial match than for a complete mismatch. This
118 * is not secure when one of the strings (e.g. an HMAC or token) must remain secret
119 * and the other may come from an attacker. Statistical analysis of timing measurements
120 * over many requests may allow the attacker to guess the string's bytes one at a time
121 * (and check his guesses) even if the timing differences are extremely small.
123 * When making such a security-sensitive comparison, it is essential that the sequence
124 * in which instructions are executed and memory locations are accessed not depend on
125 * the secret string's value. HOWEVER, for simplicity, we do not attempt to minimize
126 * the inevitable leakage of the string's length. That is generally known anyway as
127 * a chararacteristic of the hash function used to compute the secret value.
129 * Longer explanation: http://www.emerose.com/timing-attacks-explained
131 * @codeCoverageIgnore
132 * @param string $known_string Fixed-length secret string to compare against
133 * @param string $user_string User-provided string
134 * @return bool True if the strings are the same, false otherwise
136 function hash_equals( $known_string, $user_string ) {
137 // Strict type checking as in PHP's native implementation
138 if ( !is_string( $known_string ) ) {
139 trigger_error( 'hash_equals(): Expected known_string to be a string, ' .
140 gettype( $known_string ) . ' given', E_USER_WARNING
);
145 if ( !is_string( $user_string ) ) {
146 trigger_error( 'hash_equals(): Expected user_string to be a string, ' .
147 gettype( $user_string ) . ' given', E_USER_WARNING
);
152 $known_string_len = strlen( $known_string );
153 if ( $known_string_len !== strlen( $user_string ) ) {
158 for ( $i = 0; $i < $known_string_len; $i++
) {
159 $result |
= ord( $known_string[$i] ) ^
ord( $user_string[$i] );
162 return ( $result === 0 );
170 * This queues an extension to be loaded through
171 * the ExtensionRegistry system.
173 * @param string $name Name of the extension to load
174 * @param string|null $path Absolute path of where to find the extension.json file
176 function wfLoadExtension( $name, $path = null ) {
179 $path = "$IP/extensions/$name/extension.json";
181 ExtensionRegistry
::getInstance()->queue( $path );
185 * Load multiple extensions at once
187 * Same as wfLoadExtension, but more efficient if you
188 * are loading multiple extensions.
190 * If you want to specify custom paths, you should interact with
191 * ExtensionRegistry directly.
193 * @see wfLoadExtension
194 * @param string[] $exts Array of extension names to load
196 function wfLoadExtensions( array $exts ) {
198 $registry = ExtensionRegistry
::getInstance();
199 foreach ( $exts as $ext ) {
200 $registry->queue( "$IP/extensions/$ext/extension.json" );
207 * @see wfLoadExtension
208 * @param string $name Name of the extension to load
209 * @param string|null $path Absolute path of where to find the skin.json file
211 function wfLoadSkin( $name, $path = null ) {
214 $path = "$IP/skins/$name/skin.json";
216 ExtensionRegistry
::getInstance()->queue( $path );
220 * Load multiple skins at once
222 * @see wfLoadExtensions
223 * @param string[] $skins Array of extension names to load
225 function wfLoadSkins( array $skins ) {
227 $registry = ExtensionRegistry
::getInstance();
228 foreach ( $skins as $skin ) {
229 $registry->queue( "$IP/skins/$skin/skin.json" );
234 * Like array_diff( $a, $b ) except that it works with two-dimensional arrays.
239 function wfArrayDiff2( $a, $b ) {
240 return array_udiff( $a, $b, 'wfArrayDiff2_cmp' );
244 * @param array|string $a
245 * @param array|string $b
248 function wfArrayDiff2_cmp( $a, $b ) {
249 if ( is_string( $a ) && is_string( $b ) ) {
250 return strcmp( $a, $b );
251 } elseif ( count( $a ) !== count( $b ) ) {
252 return count( $a ) < count( $b ) ?
-1 : 1;
256 while ( ( list( , $valueA ) = each( $a ) ) && ( list( , $valueB ) = each( $b ) ) ) {
257 $cmp = strcmp( $valueA, $valueB );
267 * Appends to second array if $value differs from that in $default
269 * @param string|int $key
270 * @param mixed $value
271 * @param mixed $default
272 * @param array $changed Array to alter
273 * @throws MWException
275 function wfAppendToArrayIfNotDefault( $key, $value, $default, &$changed ) {
276 if ( is_null( $changed ) ) {
277 throw new MWException( 'GlobalFunctions::wfAppendToArrayIfNotDefault got null' );
279 if ( $default[$key] !== $value ) {
280 $changed[$key] = $value;
285 * Merge arrays in the style of getUserPermissionsErrors, with duplicate removal
287 * wfMergeErrorArrays(
288 * array( array( 'x' ) ),
289 * array( array( 'x', '2' ) ),
290 * array( array( 'x' ) ),
291 * array( array( 'y' ) )
300 * @param array $array1,...
303 function wfMergeErrorArrays( /*...*/ ) {
304 $args = func_get_args();
306 foreach ( $args as $errors ) {
307 foreach ( $errors as $params ) {
308 # @todo FIXME: Sometimes get nested arrays for $params,
309 # which leads to E_NOTICEs
310 $spec = implode( "\t", $params );
311 $out[$spec] = $params;
314 return array_values( $out );
318 * Insert array into another array after the specified *KEY*
320 * @param array $array The array.
321 * @param array $insert The array to insert.
322 * @param mixed $after The key to insert after
325 function wfArrayInsertAfter( array $array, array $insert, $after ) {
326 // Find the offset of the element to insert after.
327 $keys = array_keys( $array );
328 $offsetByKey = array_flip( $keys );
330 $offset = $offsetByKey[$after];
332 // Insert at the specified offset
333 $before = array_slice( $array, 0, $offset +
1, true );
334 $after = array_slice( $array, $offset +
1, count( $array ) - $offset, true );
336 $output = $before +
$insert +
$after;
342 * Recursively converts the parameter (an object) to an array with the same data
344 * @param object|array $objOrArray
345 * @param bool $recursive
348 function wfObjectToArray( $objOrArray, $recursive = true ) {
350 if ( is_object( $objOrArray ) ) {
351 $objOrArray = get_object_vars( $objOrArray );
353 foreach ( $objOrArray as $key => $value ) {
354 if ( $recursive && ( is_object( $value ) ||
is_array( $value ) ) ) {
355 $value = wfObjectToArray( $value );
358 $array[$key] = $value;
365 * Get a random decimal value between 0 and 1, in a way
366 * not likely to give duplicate values for any realistic
367 * number of articles.
371 function wfRandom() {
372 # The maximum random value is "only" 2^31-1, so get two random
373 # values to reduce the chance of dupes
374 $max = mt_getrandmax() +
1;
375 $rand = number_format( ( mt_rand() * $max +
mt_rand() ) / $max / $max, 12, '.', '' );
381 * Get a random string containing a number of pseudo-random hex
383 * @note This is not secure, if you are trying to generate some sort
384 * of token please use MWCryptRand instead.
386 * @param int $length The length of the string to generate
390 function wfRandomString( $length = 32 ) {
392 for ( $n = 0; $n < $length; $n +
= 7 ) {
393 $str .= sprintf( '%07x', mt_rand() & 0xfffffff );
395 return substr( $str, 0, $length );
399 * We want some things to be included as literal characters in our title URLs
400 * for prettiness, which urlencode encodes by default. According to RFC 1738,
401 * all of the following should be safe:
405 * But + is not safe because it's used to indicate a space; &= are only safe in
406 * paths and not in queries (and we don't distinguish here); ' seems kind of
407 * scary; and urlencode() doesn't touch -_. to begin with. Plus, although /
408 * is reserved, we don't care. So the list we unescape is:
412 * However, IIS7 redirects fail when the url contains a colon (Bug 22709),
413 * so no fancy : for IIS7.
415 * %2F in the page titles seems to fatally break for some reason.
420 function wfUrlencode( $s ) {
423 if ( is_null( $s ) ) {
428 if ( is_null( $needle ) ) {
429 $needle = array( '%3B', '%40', '%24', '%21', '%2A', '%28', '%29', '%2C', '%2F' );
430 if ( !isset( $_SERVER['SERVER_SOFTWARE'] ) ||
431 ( strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7' ) === false )
437 $s = urlencode( $s );
440 array( ';', '@', '$', '!', '*', '(', ')', ',', '/', ':' ),
448 * This function takes two arrays as input, and returns a CGI-style string, e.g.
449 * "days=7&limit=100". Options in the first array override options in the second.
450 * Options set to null or false will not be output.
452 * @param array $array1 ( String|Array )
453 * @param array $array2 ( String|Array )
454 * @param string $prefix
457 function wfArrayToCgi( $array1, $array2 = null, $prefix = '' ) {
458 if ( !is_null( $array2 ) ) {
459 $array1 = $array1 +
$array2;
463 foreach ( $array1 as $key => $value ) {
464 if ( !is_null( $value ) && $value !== false ) {
468 if ( $prefix !== '' ) {
469 $key = $prefix . "[$key]";
471 if ( is_array( $value ) ) {
473 foreach ( $value as $k => $v ) {
474 $cgi .= $firstTime ?
'' : '&';
475 if ( is_array( $v ) ) {
476 $cgi .= wfArrayToCgi( $v, null, $key . "[$k]" );
478 $cgi .= urlencode( $key . "[$k]" ) . '=' . urlencode( $v );
483 if ( is_object( $value ) ) {
484 $value = $value->__toString();
486 $cgi .= urlencode( $key ) . '=' . urlencode( $value );
494 * This is the logical opposite of wfArrayToCgi(): it accepts a query string as
495 * its argument and returns the same string in array form. This allows compatibility
496 * with legacy functions that accept raw query strings instead of nice
497 * arrays. Of course, keys and values are urldecode()d.
499 * @param string $query Query string
500 * @return string[] Array version of input
502 function wfCgiToArray( $query ) {
503 if ( isset( $query[0] ) && $query[0] == '?' ) {
504 $query = substr( $query, 1 );
506 $bits = explode( '&', $query );
508 foreach ( $bits as $bit ) {
512 if ( strpos( $bit, '=' ) === false ) {
513 // Pieces like &qwerty become 'qwerty' => '' (at least this is what php does)
517 list( $key, $value ) = explode( '=', $bit );
519 $key = urldecode( $key );
520 $value = urldecode( $value );
521 if ( strpos( $key, '[' ) !== false ) {
522 $keys = array_reverse( explode( '[', $key ) );
523 $key = array_pop( $keys );
525 foreach ( $keys as $k ) {
526 $k = substr( $k, 0, -1 );
527 $temp = array( $k => $temp );
529 if ( isset( $ret[$key] ) ) {
530 $ret[$key] = array_merge( $ret[$key], $temp );
542 * Append a query string to an existing URL, which may or may not already
543 * have query string parameters already. If so, they will be combined.
546 * @param string|string[] $query String or associative array
549 function wfAppendQuery( $url, $query ) {
550 if ( is_array( $query ) ) {
551 $query = wfArrayToCgi( $query );
553 if ( $query != '' ) {
554 if ( false === strpos( $url, '?' ) ) {
565 * Expand a potentially local URL to a fully-qualified URL. Assumes $wgServer
568 * The meaning of the PROTO_* constants is as follows:
569 * PROTO_HTTP: Output a URL starting with http://
570 * PROTO_HTTPS: Output a URL starting with https://
571 * PROTO_RELATIVE: Output a URL starting with // (protocol-relative URL)
572 * PROTO_CURRENT: Output a URL starting with either http:// or https:// , depending
573 * on which protocol was used for the current incoming request
574 * PROTO_CANONICAL: For URLs without a domain, like /w/index.php , use $wgCanonicalServer.
575 * For protocol-relative URLs, use the protocol of $wgCanonicalServer
576 * PROTO_INTERNAL: Like PROTO_CANONICAL, but uses $wgInternalServer instead of $wgCanonicalServer
578 * @todo this won't work with current-path-relative URLs
579 * like "subdir/foo.html", etc.
581 * @param string $url Either fully-qualified or a local path + query
582 * @param string $defaultProto One of the PROTO_* constants. Determines the
583 * protocol to use if $url or $wgServer is protocol-relative
584 * @return string Fully-qualified URL, current-path-relative URL or false if
585 * no valid URL can be constructed
587 function wfExpandUrl( $url, $defaultProto = PROTO_CURRENT
) {
588 global $wgServer, $wgCanonicalServer, $wgInternalServer, $wgRequest,
590 if ( $defaultProto === PROTO_CANONICAL
) {
591 $serverUrl = $wgCanonicalServer;
592 } elseif ( $defaultProto === PROTO_INTERNAL
&& $wgInternalServer !== false ) {
593 // Make $wgInternalServer fall back to $wgServer if not set
594 $serverUrl = $wgInternalServer;
596 $serverUrl = $wgServer;
597 if ( $defaultProto === PROTO_CURRENT
) {
598 $defaultProto = $wgRequest->getProtocol() . '://';
602 // Analyze $serverUrl to obtain its protocol
603 $bits = wfParseUrl( $serverUrl );
604 $serverHasProto = $bits && $bits['scheme'] != '';
606 if ( $defaultProto === PROTO_CANONICAL ||
$defaultProto === PROTO_INTERNAL
) {
607 if ( $serverHasProto ) {
608 $defaultProto = $bits['scheme'] . '://';
610 // $wgCanonicalServer or $wgInternalServer doesn't have a protocol.
611 // This really isn't supposed to happen. Fall back to HTTP in this
613 $defaultProto = PROTO_HTTP
;
617 $defaultProtoWithoutSlashes = substr( $defaultProto, 0, -2 );
619 if ( substr( $url, 0, 2 ) == '//' ) {
620 $url = $defaultProtoWithoutSlashes . $url;
621 } elseif ( substr( $url, 0, 1 ) == '/' ) {
622 // If $serverUrl is protocol-relative, prepend $defaultProtoWithoutSlashes,
623 // otherwise leave it alone.
624 $url = ( $serverHasProto ?
'' : $defaultProtoWithoutSlashes ) . $serverUrl . $url;
627 $bits = wfParseUrl( $url );
629 // ensure proper port for HTTPS arrives in URL
630 // https://bugzilla.wikimedia.org/show_bug.cgi?id=65184
631 if ( $defaultProto === PROTO_HTTPS
&& $wgHttpsPort != 443 ) {
632 $bits['port'] = $wgHttpsPort;
635 if ( $bits && isset( $bits['path'] ) ) {
636 $bits['path'] = wfRemoveDotSegments( $bits['path'] );
637 return wfAssembleUrl( $bits );
641 } elseif ( substr( $url, 0, 1 ) != '/' ) {
642 # URL is a relative path
643 return wfRemoveDotSegments( $url );
646 # Expanded URL is not valid.
651 * This function will reassemble a URL parsed with wfParseURL. This is useful
652 * if you need to edit part of a URL and put it back together.
654 * This is the basic structure used (brackets contain keys for $urlParts):
655 * [scheme][delimiter][user]:[pass]@[host]:[port][path]?[query]#[fragment]
657 * @todo Need to integrate this into wfExpandUrl (bug 32168)
660 * @param array $urlParts URL parts, as output from wfParseUrl
661 * @return string URL assembled from its component parts
663 function wfAssembleUrl( $urlParts ) {
666 if ( isset( $urlParts['delimiter'] ) ) {
667 if ( isset( $urlParts['scheme'] ) ) {
668 $result .= $urlParts['scheme'];
671 $result .= $urlParts['delimiter'];
674 if ( isset( $urlParts['host'] ) ) {
675 if ( isset( $urlParts['user'] ) ) {
676 $result .= $urlParts['user'];
677 if ( isset( $urlParts['pass'] ) ) {
678 $result .= ':' . $urlParts['pass'];
683 $result .= $urlParts['host'];
685 if ( isset( $urlParts['port'] ) ) {
686 $result .= ':' . $urlParts['port'];
690 if ( isset( $urlParts['path'] ) ) {
691 $result .= $urlParts['path'];
694 if ( isset( $urlParts['query'] ) ) {
695 $result .= '?' . $urlParts['query'];
698 if ( isset( $urlParts['fragment'] ) ) {
699 $result .= '#' . $urlParts['fragment'];
706 * Remove all dot-segments in the provided URL path. For example,
707 * '/a/./b/../c/' becomes '/a/c/'. For details on the algorithm, please see
708 * RFC3986 section 5.2.4.
710 * @todo Need to integrate this into wfExpandUrl (bug 32168)
712 * @param string $urlPath URL path, potentially containing dot-segments
713 * @return string URL path with all dot-segments removed
715 function wfRemoveDotSegments( $urlPath ) {
718 $inputLength = strlen( $urlPath );
720 while ( $inputOffset < $inputLength ) {
721 $prefixLengthOne = substr( $urlPath, $inputOffset, 1 );
722 $prefixLengthTwo = substr( $urlPath, $inputOffset, 2 );
723 $prefixLengthThree = substr( $urlPath, $inputOffset, 3 );
724 $prefixLengthFour = substr( $urlPath, $inputOffset, 4 );
727 if ( $prefixLengthTwo == './' ) {
728 # Step A, remove leading "./"
730 } elseif ( $prefixLengthThree == '../' ) {
731 # Step A, remove leading "../"
733 } elseif ( ( $prefixLengthTwo == '/.' ) && ( $inputOffset +
2 == $inputLength ) ) {
734 # Step B, replace leading "/.$" with "/"
736 $urlPath[$inputOffset] = '/';
737 } elseif ( $prefixLengthThree == '/./' ) {
738 # Step B, replace leading "/./" with "/"
740 } elseif ( $prefixLengthThree == '/..' && ( $inputOffset +
3 == $inputLength ) ) {
741 # Step C, replace leading "/..$" with "/" and
742 # remove last path component in output
744 $urlPath[$inputOffset] = '/';
746 } elseif ( $prefixLengthFour == '/../' ) {
747 # Step C, replace leading "/../" with "/" and
748 # remove last path component in output
751 } elseif ( ( $prefixLengthOne == '.' ) && ( $inputOffset +
1 == $inputLength ) ) {
752 # Step D, remove "^.$"
754 } elseif ( ( $prefixLengthTwo == '..' ) && ( $inputOffset +
2 == $inputLength ) ) {
755 # Step D, remove "^..$"
758 # Step E, move leading path segment to output
759 if ( $prefixLengthOne == '/' ) {
760 $slashPos = strpos( $urlPath, '/', $inputOffset +
1 );
762 $slashPos = strpos( $urlPath, '/', $inputOffset );
764 if ( $slashPos === false ) {
765 $output .= substr( $urlPath, $inputOffset );
766 $inputOffset = $inputLength;
768 $output .= substr( $urlPath, $inputOffset, $slashPos - $inputOffset );
769 $inputOffset +
= $slashPos - $inputOffset;
774 $slashPos = strrpos( $output, '/' );
775 if ( $slashPos === false ) {
778 $output = substr( $output, 0, $slashPos );
787 * Returns a regular expression of url protocols
789 * @param bool $includeProtocolRelative If false, remove '//' from the returned protocol list.
790 * DO NOT USE this directly, use wfUrlProtocolsWithoutProtRel() instead
793 function wfUrlProtocols( $includeProtocolRelative = true ) {
794 global $wgUrlProtocols;
796 // Cache return values separately based on $includeProtocolRelative
797 static $withProtRel = null, $withoutProtRel = null;
798 $cachedValue = $includeProtocolRelative ?
$withProtRel : $withoutProtRel;
799 if ( !is_null( $cachedValue ) ) {
803 // Support old-style $wgUrlProtocols strings, for backwards compatibility
804 // with LocalSettings files from 1.5
805 if ( is_array( $wgUrlProtocols ) ) {
806 $protocols = array();
807 foreach ( $wgUrlProtocols as $protocol ) {
808 // Filter out '//' if !$includeProtocolRelative
809 if ( $includeProtocolRelative ||
$protocol !== '//' ) {
810 $protocols[] = preg_quote( $protocol, '/' );
814 $retval = implode( '|', $protocols );
816 // Ignore $includeProtocolRelative in this case
817 // This case exists for pre-1.6 compatibility, and we can safely assume
818 // that '//' won't appear in a pre-1.6 config because protocol-relative
819 // URLs weren't supported until 1.18
820 $retval = $wgUrlProtocols;
823 // Cache return value
824 if ( $includeProtocolRelative ) {
825 $withProtRel = $retval;
827 $withoutProtRel = $retval;
833 * Like wfUrlProtocols(), but excludes '//' from the protocol list. Use this if
834 * you need a regex that matches all URL protocols but does not match protocol-
838 function wfUrlProtocolsWithoutProtRel() {
839 return wfUrlProtocols( false );
843 * parse_url() work-alike, but non-broken. Differences:
845 * 1) Does not raise warnings on bad URLs (just returns false).
846 * 2) Handles protocols that don't use :// (e.g., mailto: and news:, as well as
847 * protocol-relative URLs) correctly.
848 * 3) Adds a "delimiter" element to the array, either '://', ':' or '//' (see (2)).
850 * @param string $url A URL to parse
851 * @return string[] Bits of the URL in an associative array, per PHP docs
853 function wfParseUrl( $url ) {
854 global $wgUrlProtocols; // Allow all protocols defined in DefaultSettings/LocalSettings.php
856 // Protocol-relative URLs are handled really badly by parse_url(). It's so
857 // bad that the easiest way to handle them is to just prepend 'http:' and
858 // strip the protocol out later.
859 $wasRelative = substr( $url, 0, 2 ) == '//';
860 if ( $wasRelative ) {
863 wfSuppressWarnings();
864 $bits = parse_url( $url );
866 // parse_url() returns an array without scheme for some invalid URLs, e.g.
867 // parse_url("%0Ahttp://example.com") == array( 'host' => '%0Ahttp', 'path' => 'example.com' )
868 if ( !$bits ||
!isset( $bits['scheme'] ) ) {
872 // parse_url() incorrectly handles schemes case-sensitively. Convert it to lowercase.
873 $bits['scheme'] = strtolower( $bits['scheme'] );
875 // most of the protocols are followed by ://, but mailto: and sometimes news: not, check for it
876 if ( in_array( $bits['scheme'] . '://', $wgUrlProtocols ) ) {
877 $bits['delimiter'] = '://';
878 } elseif ( in_array( $bits['scheme'] . ':', $wgUrlProtocols ) ) {
879 $bits['delimiter'] = ':';
880 // parse_url detects for news: and mailto: the host part of an url as path
881 // We have to correct this wrong detection
882 if ( isset( $bits['path'] ) ) {
883 $bits['host'] = $bits['path'];
890 /* Provide an empty host for eg. file:/// urls (see bug 28627) */
891 if ( !isset( $bits['host'] ) ) {
895 if ( isset( $bits['path'] ) ) {
896 /* parse_url loses the third / for file:///c:/ urls (but not on variants) */
897 if ( substr( $bits['path'], 0, 1 ) !== '/' ) {
898 $bits['path'] = '/' . $bits['path'];
905 // If the URL was protocol-relative, fix scheme and delimiter
906 if ( $wasRelative ) {
907 $bits['scheme'] = '';
908 $bits['delimiter'] = '//';
914 * Take a URL, make sure it's expanded to fully qualified, and replace any
915 * encoded non-ASCII Unicode characters with their UTF-8 original forms
916 * for more compact display and legibility for local audiences.
918 * @todo handle punycode domains too
923 function wfExpandIRI( $url ) {
924 return preg_replace_callback(
925 '/((?:%[89A-F][0-9A-F])+)/i',
926 'wfExpandIRI_callback',
932 * Private callback for wfExpandIRI
933 * @param array $matches
936 function wfExpandIRI_callback( $matches ) {
937 return urldecode( $matches[1] );
941 * Make URL indexes, appropriate for the el_index field of externallinks.
946 function wfMakeUrlIndexes( $url ) {
947 $bits = wfParseUrl( $url );
949 // Reverse the labels in the hostname, convert to lower case
950 // For emails reverse domainpart only
951 if ( $bits['scheme'] == 'mailto' ) {
952 $mailparts = explode( '@', $bits['host'], 2 );
953 if ( count( $mailparts ) === 2 ) {
954 $domainpart = strtolower( implode( '.', array_reverse( explode( '.', $mailparts[1] ) ) ) );
956 // No domain specified, don't mangle it
959 $reversedHost = $domainpart . '@' . $mailparts[0];
961 $reversedHost = strtolower( implode( '.', array_reverse( explode( '.', $bits['host'] ) ) ) );
963 // Add an extra dot to the end
964 // Why? Is it in wrong place in mailto links?
965 if ( substr( $reversedHost, -1, 1 ) !== '.' ) {
966 $reversedHost .= '.';
968 // Reconstruct the pseudo-URL
969 $prot = $bits['scheme'];
970 $index = $prot . $bits['delimiter'] . $reversedHost;
971 // Leave out user and password. Add the port, path, query and fragment
972 if ( isset( $bits['port'] ) ) {
973 $index .= ':' . $bits['port'];
975 if ( isset( $bits['path'] ) ) {
976 $index .= $bits['path'];
980 if ( isset( $bits['query'] ) ) {
981 $index .= '?' . $bits['query'];
983 if ( isset( $bits['fragment'] ) ) {
984 $index .= '#' . $bits['fragment'];
988 return array( "http:$index", "https:$index" );
990 return array( $index );
995 * Check whether a given URL has a domain that occurs in a given set of domains
996 * @param string $url URL
997 * @param array $domains Array of domains (strings)
998 * @return bool True if the host part of $url ends in one of the strings in $domains
1000 function wfMatchesDomainList( $url, $domains ) {
1001 $bits = wfParseUrl( $url );
1002 if ( is_array( $bits ) && isset( $bits['host'] ) ) {
1003 $host = '.' . $bits['host'];
1004 foreach ( (array)$domains as $domain ) {
1005 $domain = '.' . $domain;
1006 if ( substr( $host, -strlen( $domain ) ) === $domain ) {
1015 * Sends a line to the debug log if enabled or, optionally, to a comment in output.
1016 * In normal operation this is a NOP.
1018 * Controlling globals:
1019 * $wgDebugLogFile - points to the log file
1020 * $wgDebugRawPage - if false, 'action=raw' hits will not result in debug output.
1021 * $wgDebugComments - if on, some debug items may appear in comments in the HTML output.
1023 * @since 1.25 support for additional context data
1025 * @param string $text
1026 * @param string|bool $dest Unused
1027 * @param array $context Additional logging context data
1029 function wfDebug( $text, $dest = 'all', array $context = array() ) {
1030 global $wgDebugRawPage, $wgDebugLogPrefix;
1031 global $wgDebugTimestamps, $wgRequestTime;
1033 if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
1037 $text = trim( $text );
1039 // Inline logic from deprecated wfDebugTimer()
1040 if ( $wgDebugTimestamps ) {
1041 $context['seconds_elapsed'] = sprintf(
1043 microtime( true ) - $wgRequestTime
1045 $context['memory_used'] = sprintf(
1047 ( memory_get_usage( true ) / ( 1024 * 1024 ) )
1051 if ( $wgDebugLogPrefix !== '' ) {
1052 $context['prefix'] = $wgDebugLogPrefix;
1055 $logger = LoggerFactory
::getInstance( 'wfDebug' );
1056 $logger->debug( $text, $context );
1060 * Returns true if debug logging should be suppressed if $wgDebugRawPage = false
1063 function wfIsDebugRawPage() {
1065 if ( $cache !== null ) {
1068 # Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
1069 if ( ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' )
1071 isset( $_SERVER['SCRIPT_NAME'] )
1072 && substr( $_SERVER['SCRIPT_NAME'], -8 ) == 'load.php'
1083 * Get microsecond timestamps for debug logs
1085 * @deprecated since 1.25
1088 function wfDebugTimer() {
1089 global $wgDebugTimestamps, $wgRequestTime;
1091 wfDeprecated( __METHOD__
, '1.25' );
1093 if ( !$wgDebugTimestamps ) {
1097 $prefix = sprintf( "%6.4f", microtime( true ) - $wgRequestTime );
1098 $mem = sprintf( "%5.1fM", ( memory_get_usage( true ) / ( 1024 * 1024 ) ) );
1099 return "$prefix $mem ";
1103 * Send a line giving PHP memory usage.
1105 * @param bool $exact Print exact byte values instead of kibibytes (default: false)
1107 function wfDebugMem( $exact = false ) {
1108 $mem = memory_get_usage();
1110 $mem = floor( $mem / 1024 ) . ' KiB';
1114 wfDebug( "Memory usage: $mem\n" );
1118 * Send a line to a supplementary debug log file, if configured, or main debug
1121 * To configure a supplementary log file, set $wgDebugLogGroups[$logGroup] to
1122 * a string filename or an associative array mapping 'destination' to the
1123 * desired filename. The associative array may also contain a 'sample' key
1124 * with an integer value, specifying a sampling factor. Sampled log events
1125 * will be emitted with a 1 in N random chance.
1127 * @since 1.23 support for sampling log messages via $wgDebugLogGroups.
1128 * @since 1.25 support for additional context data
1129 * @since 1.25 sample behavior dependent on configured $wgMWLoggerDefaultSpi
1131 * @param string $logGroup
1132 * @param string $text
1133 * @param string|bool $dest Destination of the message:
1134 * - 'all': both to the log and HTML (debug toolbar or HTML comments)
1135 * - 'log': only to the log and not in HTML
1136 * - 'private': only to the specific log if set in $wgDebugLogGroups and
1137 * discarded otherwise
1138 * For backward compatibility, it can also take a boolean:
1139 * - true: same as 'all'
1140 * - false: same as 'private'
1141 * @param array $context Additional logging context data
1143 function wfDebugLog(
1144 $logGroup, $text, $dest = 'all', array $context = array()
1146 // Turn $dest into a string if it's a boolean (for b/c)
1147 if ( $dest === true ) {
1149 } elseif ( $dest === false ) {
1153 $text = trim( $text );
1155 $logger = LoggerFactory
::getInstance( $logGroup );
1156 $context['private'] = ( $dest === 'private' );
1157 $logger->info( $text, $context );
1161 * Log for database errors
1163 * @since 1.25 support for additional context data
1165 * @param string $text Database error message.
1166 * @param array $context Additional logging context data
1168 function wfLogDBError( $text, array $context = array() ) {
1169 $logger = LoggerFactory
::getInstance( 'wfLogDBError' );
1170 $logger->error( trim( $text ), $context );
1174 * Throws a warning that $function is deprecated
1176 * @param string $function
1177 * @param string|bool $version Version of MediaWiki that the function
1178 * was deprecated in (Added in 1.19).
1179 * @param string|bool $component Added in 1.19.
1180 * @param int $callerOffset How far up the call stack is the original
1181 * caller. 2 = function that called the function that called
1182 * wfDeprecated (Added in 1.20)
1186 function wfDeprecated( $function, $version = false, $component = false, $callerOffset = 2 ) {
1187 MWDebug
::deprecated( $function, $version, $component, $callerOffset +
1 );
1191 * Send a warning either to the debug log or in a PHP error depending on
1192 * $wgDevelopmentWarnings. To log warnings in production, use wfLogWarning() instead.
1194 * @param string $msg Message to send
1195 * @param int $callerOffset Number of items to go back in the backtrace to
1196 * find the correct caller (1 = function calling wfWarn, ...)
1197 * @param int $level PHP error level; defaults to E_USER_NOTICE;
1198 * only used when $wgDevelopmentWarnings is true
1200 function wfWarn( $msg, $callerOffset = 1, $level = E_USER_NOTICE
) {
1201 MWDebug
::warning( $msg, $callerOffset +
1, $level, 'auto' );
1205 * Send a warning as a PHP error and the debug log. This is intended for logging
1206 * warnings in production. For logging development warnings, use WfWarn instead.
1208 * @param string $msg Message to send
1209 * @param int $callerOffset Number of items to go back in the backtrace to
1210 * find the correct caller (1 = function calling wfLogWarning, ...)
1211 * @param int $level PHP error level; defaults to E_USER_WARNING
1213 function wfLogWarning( $msg, $callerOffset = 1, $level = E_USER_WARNING
) {
1214 MWDebug
::warning( $msg, $callerOffset +
1, $level, 'production' );
1218 * Log to a file without getting "file size exceeded" signals.
1220 * Can also log to TCP or UDP with the syntax udp://host:port/prefix. This will
1221 * send lines to the specified port, prefixed by the specified prefix and a space.
1222 * @since 1.25 support for additional context data
1224 * @param string $text
1225 * @param string $file Filename
1226 * @param array $context Additional logging context data
1227 * @throws MWException
1228 * @deprecated since 1.25 Use MediaWiki\Logger\LegacyLogger::emit or UDPTransport
1230 function wfErrorLog( $text, $file, array $context = array() ) {
1231 wfDeprecated( __METHOD__
, '1.25' );
1232 $logger = LoggerFactory
::getInstance( 'wfErrorLog' );
1233 $context['destination'] = $file;
1234 $logger->info( trim( $text ), $context );
1240 function wfLogProfilingData() {
1241 global $wgDebugLogGroups, $wgDebugRawPage;
1243 $context = RequestContext
::getMain();
1244 $request = $context->getRequest();
1246 $profiler = Profiler
::instance();
1247 $profiler->setContext( $context );
1248 $profiler->logData();
1250 $config = $context->getConfig();
1251 if ( $config->has( 'StatsdServer' ) ) {
1252 $statsdServer = explode( ':', $config->get( 'StatsdServer' ) );
1253 $statsdHost = $statsdServer[0];
1254 $statsdPort = isset( $statsdServer[1] ) ?
$statsdServer[1] : 8125;
1255 $statsdSender = new SocketSender( $statsdHost, $statsdPort );
1256 $statsdClient = new StatsdClient( $statsdSender );
1257 $statsdClient->send( $context->getStats()->getBuffer() );
1260 # Profiling must actually be enabled...
1261 if ( $profiler instanceof ProfilerStub
) {
1265 if ( isset( $wgDebugLogGroups['profileoutput'] )
1266 && $wgDebugLogGroups['profileoutput'] === false
1268 // Explicitly disabled
1271 if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
1275 $ctx = array( 'elapsed' => $request->getElapsedTime() );
1276 if ( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
1277 $ctx['forwarded_for'] = $_SERVER['HTTP_X_FORWARDED_FOR'];
1279 if ( !empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
1280 $ctx['client_ip'] = $_SERVER['HTTP_CLIENT_IP'];
1282 if ( !empty( $_SERVER['HTTP_FROM'] ) ) {
1283 $ctx['from'] = $_SERVER['HTTP_FROM'];
1285 if ( isset( $ctx['forwarded_for'] ) ||
1286 isset( $ctx['client_ip'] ) ||
1287 isset( $ctx['from'] ) ) {
1288 $ctx['proxy'] = $_SERVER['REMOTE_ADDR'];
1291 // Don't load $wgUser at this late stage just for statistics purposes
1292 // @todo FIXME: We can detect some anons even if it is not loaded.
1293 // See User::getId()
1294 $user = $context->getUser();
1295 $ctx['anon'] = $user->isItemLoaded( 'id' ) && $user->isAnon();
1297 // Command line script uses a FauxRequest object which does not have
1298 // any knowledge about an URL and throw an exception instead.
1300 $ctx['url'] = urldecode( $request->getRequestURL() );
1301 } catch ( Exception
$ignored ) {
1305 $ctx['output'] = $profiler->getOutput();
1307 $log = LoggerFactory
::getInstance( 'profileoutput' );
1308 $log->info( "Elapsed: {elapsed}; URL: <{url}>\n{output}", $ctx );
1312 * Increment a statistics counter
1314 * @param string $key
1318 function wfIncrStats( $key, $count = 1 ) {
1319 $stats = RequestContext
::getMain()->getStats();
1320 $stats->updateCount( $key, $count );
1324 * Check whether the wiki is in read-only mode.
1328 function wfReadOnly() {
1329 return wfReadOnlyReason() !== false;
1333 * Get the value of $wgReadOnly or the contents of $wgReadOnlyFile.
1335 * @return string|bool String when in read-only mode; false otherwise
1337 function wfReadOnlyReason() {
1338 global $wgReadOnly, $wgReadOnlyFile;
1340 if ( $wgReadOnly === null ) {
1341 // Set $wgReadOnly for faster access next time
1342 if ( is_file( $wgReadOnlyFile ) && filesize( $wgReadOnlyFile ) > 0 ) {
1343 $wgReadOnly = file_get_contents( $wgReadOnlyFile );
1345 $wgReadOnly = false;
1347 // Callers use this method to be aware that data presented to a user
1348 // may be very stale and thus allowing submissions can be problematic.
1349 if ( $wgReadOnly === false && wfGetLB()->getLaggedSlaveMode() ) {
1350 $wgReadOnly = 'The database has been automatically locked ' .
1351 'while the slave database servers catch up to the master';
1359 * Return a Language object from $langcode
1361 * @param Language|string|bool $langcode Either:
1362 * - a Language object
1363 * - code of the language to get the message for, if it is
1364 * a valid code create a language for that language, if
1365 * it is a string but not a valid code then make a basic
1367 * - a boolean: if it's false then use the global object for
1368 * the current user's language (as a fallback for the old parameter
1369 * functionality), or if it is true then use global object
1370 * for the wiki's content language.
1373 function wfGetLangObj( $langcode = false ) {
1374 # Identify which language to get or create a language object for.
1375 # Using is_object here due to Stub objects.
1376 if ( is_object( $langcode ) ) {
1377 # Great, we already have the object (hopefully)!
1381 global $wgContLang, $wgLanguageCode;
1382 if ( $langcode === true ||
$langcode === $wgLanguageCode ) {
1383 # $langcode is the language code of the wikis content language object.
1384 # or it is a boolean and value is true
1389 if ( $langcode === false ||
$langcode === $wgLang->getCode() ) {
1390 # $langcode is the language code of user language object.
1391 # or it was a boolean and value is false
1395 $validCodes = array_keys( Language
::fetchLanguageNames() );
1396 if ( in_array( $langcode, $validCodes ) ) {
1397 # $langcode corresponds to a valid language.
1398 return Language
::factory( $langcode );
1401 # $langcode is a string, but not a valid language code; use content language.
1402 wfDebug( "Invalid language code passed to wfGetLangObj, falling back to content language.\n" );
1407 * This is the function for getting translated interface messages.
1409 * @see Message class for documentation how to use them.
1410 * @see https://www.mediawiki.org/wiki/Manual:Messages_API
1412 * This function replaces all old wfMsg* functions.
1414 * @param string|string[] $key Message key, or array of keys
1415 * @param mixed $params,... Normal message parameters
1420 * @see Message::__construct
1422 function wfMessage( $key /*...*/ ) {
1423 $params = func_get_args();
1424 array_shift( $params );
1425 if ( isset( $params[0] ) && is_array( $params[0] ) ) {
1426 $params = $params[0];
1428 return new Message( $key, $params );
1432 * This function accepts multiple message keys and returns a message instance
1433 * for the first message which is non-empty. If all messages are empty then an
1434 * instance of the first message key is returned.
1436 * @param string|string[] $keys,... Message keys
1441 * @see Message::newFallbackSequence
1443 function wfMessageFallback( /*...*/ ) {
1444 $args = func_get_args();
1445 return call_user_func_array( 'Message::newFallbackSequence', $args );
1449 * Get a message from anywhere, for the current user language.
1451 * Use wfMsgForContent() instead if the message should NOT
1452 * change depending on the user preferences.
1454 * @deprecated since 1.18
1456 * @param string $key Lookup key for the message, usually
1457 * defined in languages/Language.php
1459 * Parameters to the message, which can be used to insert variable text into
1460 * it, can be passed to this function in the following formats:
1461 * - One per argument, starting at the second parameter
1462 * - As an array in the second parameter
1463 * These are not shown in the function definition.
1467 function wfMsg( $key ) {
1468 wfDeprecated( __METHOD__
, '1.21' );
1470 $args = func_get_args();
1471 array_shift( $args );
1472 return wfMsgReal( $key, $args );
1476 * Same as above except doesn't transform the message
1478 * @deprecated since 1.18
1480 * @param string $key
1483 function wfMsgNoTrans( $key ) {
1484 wfDeprecated( __METHOD__
, '1.21' );
1486 $args = func_get_args();
1487 array_shift( $args );
1488 return wfMsgReal( $key, $args, true, false, false );
1492 * Get a message from anywhere, for the current global language
1493 * set with $wgLanguageCode.
1495 * Use this if the message should NOT change dependent on the
1496 * language set in the user's preferences. This is the case for
1497 * most text written into logs, as well as link targets (such as
1498 * the name of the copyright policy page). Link titles, on the
1499 * other hand, should be shown in the UI language.
1501 * Note that MediaWiki allows users to change the user interface
1502 * language in their preferences, but a single installation
1503 * typically only contains content in one language.
1505 * Be wary of this distinction: If you use wfMsg() where you should
1506 * use wfMsgForContent(), a user of the software may have to
1507 * customize potentially hundreds of messages in
1508 * order to, e.g., fix a link in every possible language.
1510 * @deprecated since 1.18
1512 * @param string $key Lookup key for the message, usually
1513 * defined in languages/Language.php
1516 function wfMsgForContent( $key ) {
1517 wfDeprecated( __METHOD__
, '1.21' );
1519 global $wgForceUIMsgAsContentMsg;
1520 $args = func_get_args();
1521 array_shift( $args );
1523 if ( is_array( $wgForceUIMsgAsContentMsg )
1524 && in_array( $key, $wgForceUIMsgAsContentMsg )
1526 $forcontent = false;
1528 return wfMsgReal( $key, $args, true, $forcontent );
1532 * Same as above except doesn't transform the message
1534 * @deprecated since 1.18
1536 * @param string $key
1539 function wfMsgForContentNoTrans( $key ) {
1540 wfDeprecated( __METHOD__
, '1.21' );
1542 global $wgForceUIMsgAsContentMsg;
1543 $args = func_get_args();
1544 array_shift( $args );
1546 if ( is_array( $wgForceUIMsgAsContentMsg )
1547 && in_array( $key, $wgForceUIMsgAsContentMsg )
1549 $forcontent = false;
1551 return wfMsgReal( $key, $args, true, $forcontent, false );
1555 * Really get a message
1557 * @deprecated since 1.18
1559 * @param string $key Key to get.
1560 * @param array $args
1561 * @param bool $useDB
1562 * @param string|bool $forContent Language code, or false for user lang, true for content lang.
1563 * @param bool $transform Whether or not to transform the message.
1564 * @return string The requested message.
1566 function wfMsgReal( $key, $args, $useDB = true, $forContent = false, $transform = true ) {
1567 wfDeprecated( __METHOD__
, '1.21' );
1569 $message = wfMsgGetKey( $key, $useDB, $forContent, $transform );
1570 $message = wfMsgReplaceArgs( $message, $args );
1575 * Fetch a message string value, but don't replace any keys yet.
1577 * @deprecated since 1.18
1579 * @param string $key
1580 * @param bool $useDB
1581 * @param string|bool $langCode Code of the language to get the message for, or
1582 * behaves as a content language switch if it is a boolean.
1583 * @param bool $transform Whether to parse magic words, etc.
1586 function wfMsgGetKey( $key, $useDB = true, $langCode = false, $transform = true ) {
1587 wfDeprecated( __METHOD__
, '1.21' );
1589 Hooks
::run( 'NormalizeMessageKey', array( &$key, &$useDB, &$langCode, &$transform ) );
1591 $cache = MessageCache
::singleton();
1592 $message = $cache->get( $key, $useDB, $langCode );
1593 if ( $message === false ) {
1594 $message = '<' . htmlspecialchars( $key ) . '>';
1595 } elseif ( $transform ) {
1596 $message = $cache->transform( $message );
1602 * Replace message parameter keys on the given formatted output.
1604 * @param string $message
1605 * @param array $args
1609 function wfMsgReplaceArgs( $message, $args ) {
1610 # Fix windows line-endings
1611 # Some messages are split with explode("\n", $msg)
1612 $message = str_replace( "\r", '', $message );
1614 // Replace arguments
1615 if ( count( $args ) ) {
1616 if ( is_array( $args[0] ) ) {
1617 $args = array_values( $args[0] );
1619 $replacementKeys = array();
1620 foreach ( $args as $n => $param ) {
1621 $replacementKeys['$' . ( $n +
1 )] = $param;
1623 $message = strtr( $message, $replacementKeys );
1630 * Return an HTML-escaped version of a message.
1631 * Parameter replacements, if any, are done *after* the HTML-escaping,
1632 * so parameters may contain HTML (eg links or form controls). Be sure
1633 * to pre-escape them if you really do want plaintext, or just wrap
1634 * the whole thing in htmlspecialchars().
1636 * @deprecated since 1.18
1638 * @param string $key
1639 * @param string $args,... Parameters
1642 function wfMsgHtml( $key ) {
1643 wfDeprecated( __METHOD__
, '1.21' );
1645 $args = func_get_args();
1646 array_shift( $args );
1647 return wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $key ) ), $args );
1651 * Return an HTML version of message
1652 * Parameter replacements, if any, are done *after* parsing the wiki-text message,
1653 * so parameters may contain HTML (eg links or form controls). Be sure
1654 * to pre-escape them if you really do want plaintext, or just wrap
1655 * the whole thing in htmlspecialchars().
1657 * @deprecated since 1.18
1659 * @param string $key
1660 * @param string $args,... Parameters
1663 function wfMsgWikiHtml( $key ) {
1664 wfDeprecated( __METHOD__
, '1.21' );
1666 $args = func_get_args();
1667 array_shift( $args );
1668 return wfMsgReplaceArgs(
1669 MessageCache
::singleton()->parse( wfMsgGetKey( $key ), null,
1670 /* can't be set to false */ true, /* interface */ true )->getText(),
1675 * Returns message in the requested format
1677 * @deprecated since 1.18
1679 * @param string $key Key of the message
1680 * @param array $options Processing rules.
1681 * Can take the following options:
1682 * parse: parses wikitext to HTML
1683 * parseinline: parses wikitext to HTML and removes the surrounding
1684 * p's added by parser or tidy
1685 * escape: filters message through htmlspecialchars
1686 * escapenoentities: same, but allows entity references like   through
1687 * replaceafter: parameters are substituted after parsing or escaping
1688 * parsemag: transform the message using magic phrases
1689 * content: fetch message for content language instead of interface
1690 * Also can accept a single associative argument, of the form 'language' => 'xx':
1691 * language: Language object or language code to fetch message for
1692 * (overridden by content).
1693 * Behavior for conflicting options (e.g., parse+parseinline) is undefined.
1697 function wfMsgExt( $key, $options ) {
1698 wfDeprecated( __METHOD__
, '1.21' );
1700 $args = func_get_args();
1701 array_shift( $args );
1702 array_shift( $args );
1703 $options = (array)$options;
1704 $validOptions = array( 'parse', 'parseinline', 'escape', 'escapenoentities', 'replaceafter',
1705 'parsemag', 'content' );
1707 foreach ( $options as $arrayKey => $option ) {
1708 if ( !preg_match( '/^[0-9]+|language$/', $arrayKey ) ) {
1709 // An unknown index, neither numeric nor "language"
1710 wfWarn( "wfMsgExt called with incorrect parameter key $arrayKey", 1, E_USER_WARNING
);
1711 } elseif ( preg_match( '/^[0-9]+$/', $arrayKey ) && !in_array( $option, $validOptions ) ) {
1712 // A numeric index with unknown value
1713 wfWarn( "wfMsgExt called with incorrect parameter $option", 1, E_USER_WARNING
);
1717 if ( in_array( 'content', $options, true ) ) {
1720 $langCodeObj = null;
1721 } elseif ( array_key_exists( 'language', $options ) ) {
1722 $forContent = false;
1723 $langCode = wfGetLangObj( $options['language'] );
1724 $langCodeObj = $langCode;
1726 $forContent = false;
1728 $langCodeObj = null;
1731 $string = wfMsgGetKey( $key, /*DB*/true, $langCode, /*Transform*/false );
1733 if ( !in_array( 'replaceafter', $options, true ) ) {
1734 $string = wfMsgReplaceArgs( $string, $args );
1737 $messageCache = MessageCache
::singleton();
1738 $parseInline = in_array( 'parseinline', $options, true );
1739 if ( in_array( 'parse', $options, true ) ||
$parseInline ) {
1740 $string = $messageCache->parse( $string, null, true, !$forContent, $langCodeObj );
1741 if ( $string instanceof ParserOutput
) {
1742 $string = $string->getText();
1745 if ( $parseInline ) {
1746 $string = Parser
::stripOuterParagraph( $string );
1748 } elseif ( in_array( 'parsemag', $options, true ) ) {
1749 $string = $messageCache->transform( $string,
1750 !$forContent, $langCodeObj );
1753 if ( in_array( 'escape', $options, true ) ) {
1754 $string = htmlspecialchars ( $string );
1755 } elseif ( in_array( 'escapenoentities', $options, true ) ) {
1756 $string = Sanitizer
::escapeHtmlAllowEntities( $string );
1759 if ( in_array( 'replaceafter', $options, true ) ) {
1760 $string = wfMsgReplaceArgs( $string, $args );
1767 * Since wfMsg() and co suck, they don't return false if the message key they
1768 * looked up didn't exist but instead the key wrapped in <>'s, this function checks for the
1769 * nonexistence of messages by checking the MessageCache::get() result directly.
1771 * @deprecated since 1.18. Use Message::isDisabled().
1773 * @param string $key The message key looked up
1774 * @return bool True if the message *doesn't* exist.
1776 function wfEmptyMsg( $key ) {
1777 wfDeprecated( __METHOD__
, '1.21' );
1779 return MessageCache
::singleton()->get( $key, /*useDB*/true, /*content*/false ) === false;
1783 * Fetch server name for use in error reporting etc.
1784 * Use real server name if available, so we know which machine
1785 * in a server farm generated the current page.
1789 function wfHostname() {
1791 if ( is_null( $host ) ) {
1793 # Hostname overriding
1794 global $wgOverrideHostname;
1795 if ( $wgOverrideHostname !== false ) {
1796 # Set static and skip any detection
1797 $host = $wgOverrideHostname;
1801 if ( function_exists( 'posix_uname' ) ) {
1802 // This function not present on Windows
1803 $uname = posix_uname();
1807 if ( is_array( $uname ) && isset( $uname['nodename'] ) ) {
1808 $host = $uname['nodename'];
1809 } elseif ( getenv( 'COMPUTERNAME' ) ) {
1810 # Windows computer name
1811 $host = getenv( 'COMPUTERNAME' );
1813 # This may be a virtual server.
1814 $host = $_SERVER['SERVER_NAME'];
1821 * Returns a script tag that stores the amount of time it took MediaWiki to
1822 * handle the request in milliseconds as 'wgBackendResponseTime'.
1824 * If $wgShowHostnames is true, the script will also set 'wgHostname' to the
1825 * hostname of the server handling the request.
1829 function wfReportTime() {
1830 global $wgRequestTime, $wgShowHostnames;
1832 $responseTime = round( ( microtime( true ) - $wgRequestTime ) * 1000 );
1833 $reportVars = array( 'wgBackendResponseTime' => $responseTime );
1834 if ( $wgShowHostnames ) {
1835 $reportVars['wgHostname'] = wfHostname();
1837 return Skin
::makeVariablesScript( $reportVars );
1841 * Safety wrapper for debug_backtrace().
1843 * Will return an empty array if debug_backtrace is disabled, otherwise
1844 * the output from debug_backtrace() (trimmed).
1846 * @param int $limit This parameter can be used to limit the number of stack frames returned
1848 * @return array Array of backtrace information
1850 function wfDebugBacktrace( $limit = 0 ) {
1851 static $disabled = null;
1853 if ( is_null( $disabled ) ) {
1854 $disabled = !function_exists( 'debug_backtrace' );
1856 wfDebug( "debug_backtrace() is disabled\n" );
1863 if ( $limit && version_compare( PHP_VERSION
, '5.4.0', '>=' ) ) {
1864 return array_slice( debug_backtrace( DEBUG_BACKTRACE_PROVIDE_OBJECT
, $limit +
1 ), 1 );
1866 return array_slice( debug_backtrace(), 1 );
1871 * Get a debug backtrace as a string
1873 * @param bool|null $raw If true, the return value is plain text. If false, HTML.
1874 * Defaults to $wgCommandLineMode if unset.
1876 * @since 1.25 Supports $raw parameter.
1878 function wfBacktrace( $raw = null ) {
1879 global $wgCommandLineMode;
1881 if ( $raw === null ) {
1882 $raw = $wgCommandLineMode;
1886 $frameFormat = "%s line %s calls %s()\n";
1887 $traceFormat = "%s";
1889 $frameFormat = "<li>%s line %s calls %s()</li>\n";
1890 $traceFormat = "<ul>\n%s</ul>\n";
1893 $frames = array_map( function ( $frame ) use ( $frameFormat ) {
1894 $file = !empty( $frame['file'] ) ?
basename( $frame['file'] ) : '-';
1895 $line = isset( $frame['line'] ) ?
$frame['line'] : '-';
1896 $call = $frame['function'];
1897 if ( !empty( $frame['class'] ) ) {
1898 $call = $frame['class'] . $frame['type'] . $call;
1900 return sprintf( $frameFormat, $file, $line, $call );
1901 }, wfDebugBacktrace() );
1903 return sprintf( $traceFormat, implode( '', $frames ) );
1907 * Get the name of the function which called this function
1908 * wfGetCaller( 1 ) is the function with the wfGetCaller() call (ie. __FUNCTION__)
1909 * wfGetCaller( 2 ) [default] is the caller of the function running wfGetCaller()
1910 * wfGetCaller( 3 ) is the parent of that.
1915 function wfGetCaller( $level = 2 ) {
1916 $backtrace = wfDebugBacktrace( $level +
1 );
1917 if ( isset( $backtrace[$level] ) ) {
1918 return wfFormatStackFrame( $backtrace[$level] );
1925 * Return a string consisting of callers in the stack. Useful sometimes
1926 * for profiling specific points.
1928 * @param int $limit The maximum depth of the stack frame to return, or false for the entire stack.
1931 function wfGetAllCallers( $limit = 3 ) {
1932 $trace = array_reverse( wfDebugBacktrace() );
1933 if ( !$limit ||
$limit > count( $trace ) - 1 ) {
1934 $limit = count( $trace ) - 1;
1936 $trace = array_slice( $trace, -$limit - 1, $limit );
1937 return implode( '/', array_map( 'wfFormatStackFrame', $trace ) );
1941 * Return a string representation of frame
1943 * @param array $frame
1946 function wfFormatStackFrame( $frame ) {
1947 return isset( $frame['class'] ) ?
1948 $frame['class'] . '::' . $frame['function'] :
1952 /* Some generic result counters, pulled out of SearchEngine */
1957 * @param int $offset
1961 function wfShowingResults( $offset, $limit ) {
1962 return wfMessage( 'showingresults' )->numParams( $limit, $offset +
1 )->parse();
1967 * @todo FIXME: We may want to blacklist some broken browsers
1969 * @param bool $force
1970 * @return bool Whereas client accept gzip compression
1972 function wfClientAcceptsGzip( $force = false ) {
1973 static $result = null;
1974 if ( $result === null ||
$force ) {
1976 if ( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
1977 # @todo FIXME: We may want to blacklist some broken browsers
1980 '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
1981 $_SERVER['HTTP_ACCEPT_ENCODING'],
1985 if ( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) {
1989 wfDebug( "wfClientAcceptsGzip: client accepts gzip.\n" );
1998 * Obtain the offset and limit values from the request string;
1999 * used in special pages
2001 * @param int $deflimit Default limit if none supplied
2002 * @param string $optionname Name of a user preference to check against
2004 * @deprecated since 1.24, just call WebRequest::getLimitOffset() directly
2006 function wfCheckLimits( $deflimit = 50, $optionname = 'rclimit' ) {
2008 wfDeprecated( __METHOD__
, '1.24' );
2009 return $wgRequest->getLimitOffset( $deflimit, $optionname );
2013 * Escapes the given text so that it may be output using addWikiText()
2014 * without any linking, formatting, etc. making its way through. This
2015 * is achieved by substituting certain characters with HTML entities.
2016 * As required by the callers, "<nowiki>" is not used.
2018 * @param string $text Text to be escaped
2021 function wfEscapeWikiText( $text ) {
2022 static $repl = null, $repl2 = null;
2023 if ( $repl === null ) {
2025 '"' => '"', '&' => '&', "'" => ''', '<' => '<',
2026 '=' => '=', '>' => '>', '[' => '[', ']' => ']',
2027 '{' => '{', '|' => '|', '}' => '}', ';' => ';',
2028 "\n#" => "\n#", "\r#" => "\r#",
2029 "\n*" => "\n*", "\r*" => "\r*",
2030 "\n:" => "\n:", "\r:" => "\r:",
2031 "\n " => "\n ", "\r " => "\r ",
2032 "\n\n" => "\n ", "\r\n" => " \n",
2033 "\n\r" => "\n ", "\r\r" => "\r ",
2034 "\n\t" => "\n	", "\r\t" => "\r	", // "\n\t\n" is treated like "\n\n"
2035 "\n----" => "\n----", "\r----" => "\r----",
2036 '__' => '__', '://' => '://',
2039 // We have to catch everything "\s" matches in PCRE
2040 foreach ( array( 'ISBN', 'RFC', 'PMID' ) as $magic ) {
2041 $repl["$magic "] = "$magic ";
2042 $repl["$magic\t"] = "$magic	";
2043 $repl["$magic\r"] = "$magic ";
2044 $repl["$magic\n"] = "$magic ";
2045 $repl["$magic\f"] = "$magic";
2048 // And handle protocols that don't use "://"
2049 global $wgUrlProtocols;
2051 foreach ( $wgUrlProtocols as $prot ) {
2052 if ( substr( $prot, -1 ) === ':' ) {
2053 $repl2[] = preg_quote( substr( $prot, 0, -1 ), '/' );
2056 $repl2 = $repl2 ?
'/\b(' . join( '|', $repl2 ) . '):/i' : '/^(?!)/';
2058 $text = substr( strtr( "\n$text", $repl ), 1 );
2059 $text = preg_replace( $repl2, '$1:', $text );
2064 * Sets dest to source and returns the original value of dest
2065 * If source is NULL, it just returns the value, it doesn't set the variable
2066 * If force is true, it will set the value even if source is NULL
2068 * @param mixed $dest
2069 * @param mixed $source
2070 * @param bool $force
2073 function wfSetVar( &$dest, $source, $force = false ) {
2075 if ( !is_null( $source ) ||
$force ) {
2082 * As for wfSetVar except setting a bit
2086 * @param bool $state
2090 function wfSetBit( &$dest, $bit, $state = true ) {
2091 $temp = (bool)( $dest & $bit );
2092 if ( !is_null( $state ) ) {
2103 * A wrapper around the PHP function var_export().
2104 * Either print it or add it to the regular output ($wgOut).
2106 * @param mixed $var A PHP variable to dump.
2108 function wfVarDump( $var ) {
2110 $s = str_replace( "\n", "<br />\n", var_export( $var, true ) . "\n" );
2111 if ( headers_sent() ||
!isset( $wgOut ) ||
!is_object( $wgOut ) ) {
2114 $wgOut->addHTML( $s );
2119 * Provide a simple HTTP error.
2121 * @param int|string $code
2122 * @param string $label
2123 * @param string $desc
2125 function wfHttpError( $code, $label, $desc ) {
2127 header( "HTTP/1.0 $code $label" );
2128 header( "Status: $code $label" );
2131 $wgOut->sendCacheControl();
2134 header( 'Content-type: text/html; charset=utf-8' );
2135 print "<!doctype html>" .
2136 '<html><head><title>' .
2137 htmlspecialchars( $label ) .
2138 '</title></head><body><h1>' .
2139 htmlspecialchars( $label ) .
2141 nl2br( htmlspecialchars( $desc ) ) .
2142 "</p></body></html>\n";
2146 * Clear away any user-level output buffers, discarding contents.
2148 * Suitable for 'starting afresh', for instance when streaming
2149 * relatively large amounts of data without buffering, or wanting to
2150 * output image files without ob_gzhandler's compression.
2152 * The optional $resetGzipEncoding parameter controls suppression of
2153 * the Content-Encoding header sent by ob_gzhandler; by default it
2154 * is left. See comments for wfClearOutputBuffers() for why it would
2157 * Note that some PHP configuration options may add output buffer
2158 * layers which cannot be removed; these are left in place.
2160 * @param bool $resetGzipEncoding
2162 function wfResetOutputBuffers( $resetGzipEncoding = true ) {
2163 if ( $resetGzipEncoding ) {
2164 // Suppress Content-Encoding and Content-Length
2165 // headers from 1.10+s wfOutputHandler
2166 global $wgDisableOutputCompression;
2167 $wgDisableOutputCompression = true;
2169 while ( $status = ob_get_status() ) {
2170 if ( $status['type'] == 0 /* PHP_OUTPUT_HANDLER_INTERNAL */ ) {
2171 // Probably from zlib.output_compression or other
2172 // PHP-internal setting which can't be removed.
2174 // Give up, and hope the result doesn't break
2178 if ( !ob_end_clean() ) {
2179 // Could not remove output buffer handler; abort now
2180 // to avoid getting in some kind of infinite loop.
2183 if ( $resetGzipEncoding ) {
2184 if ( $status['name'] == 'ob_gzhandler' ) {
2185 // Reset the 'Content-Encoding' field set by this handler
2186 // so we can start fresh.
2187 header_remove( 'Content-Encoding' );
2195 * More legible than passing a 'false' parameter to wfResetOutputBuffers():
2197 * Clear away output buffers, but keep the Content-Encoding header
2198 * produced by ob_gzhandler, if any.
2200 * This should be used for HTTP 304 responses, where you need to
2201 * preserve the Content-Encoding header of the real result, but
2202 * also need to suppress the output of ob_gzhandler to keep to spec
2203 * and avoid breaking Firefox in rare cases where the headers and
2204 * body are broken over two packets.
2206 function wfClearOutputBuffers() {
2207 wfResetOutputBuffers( false );
2211 * Converts an Accept-* header into an array mapping string values to quality
2214 * @param string $accept
2215 * @param string $def Default
2216 * @return float[] Associative array of string => float pairs
2218 function wfAcceptToPrefs( $accept, $def = '*/*' ) {
2219 # No arg means accept anything (per HTTP spec)
2221 return array( $def => 1.0 );
2226 $parts = explode( ',', $accept );
2228 foreach ( $parts as $part ) {
2229 # @todo FIXME: Doesn't deal with params like 'text/html; level=1'
2230 $values = explode( ';', trim( $part ) );
2232 if ( count( $values ) == 1 ) {
2233 $prefs[$values[0]] = 1.0;
2234 } elseif ( preg_match( '/q\s*=\s*(\d*\.\d+)/', $values[1], $match ) ) {
2235 $prefs[$values[0]] = floatval( $match[1] );
2243 * Checks if a given MIME type matches any of the keys in the given
2244 * array. Basic wildcards are accepted in the array keys.
2246 * Returns the matching MIME type (or wildcard) if a match, otherwise
2249 * @param string $type
2250 * @param array $avail
2254 function mimeTypeMatch( $type, $avail ) {
2255 if ( array_key_exists( $type, $avail ) ) {
2258 $parts = explode( '/', $type );
2259 if ( array_key_exists( $parts[0] . '/*', $avail ) ) {
2260 return $parts[0] . '/*';
2261 } elseif ( array_key_exists( '*/*', $avail ) ) {
2270 * Returns the 'best' match between a client's requested internet media types
2271 * and the server's list of available types. Each list should be an associative
2272 * array of type to preference (preference is a float between 0.0 and 1.0).
2273 * Wildcards in the types are acceptable.
2275 * @param array $cprefs Client's acceptable type list
2276 * @param array $sprefs Server's offered types
2279 * @todo FIXME: Doesn't handle params like 'text/plain; charset=UTF-8'
2280 * XXX: generalize to negotiate other stuff
2282 function wfNegotiateType( $cprefs, $sprefs ) {
2285 foreach ( array_keys( $sprefs ) as $type ) {
2286 $parts = explode( '/', $type );
2287 if ( $parts[1] != '*' ) {
2288 $ckey = mimeTypeMatch( $type, $cprefs );
2290 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
2295 foreach ( array_keys( $cprefs ) as $type ) {
2296 $parts = explode( '/', $type );
2297 if ( $parts[1] != '*' && !array_key_exists( $type, $sprefs ) ) {
2298 $skey = mimeTypeMatch( $type, $sprefs );
2300 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
2308 foreach ( array_keys( $combine ) as $type ) {
2309 if ( $combine[$type] > $bestq ) {
2311 $bestq = $combine[$type];
2319 * Reference-counted warning suppression
2323 function wfSuppressWarnings( $end = false ) {
2324 static $suppressCount = 0;
2325 static $originalLevel = false;
2328 if ( $suppressCount ) {
2330 if ( !$suppressCount ) {
2331 error_reporting( $originalLevel );
2335 if ( !$suppressCount ) {
2336 $originalLevel = error_reporting( E_ALL
& ~
(
2351 * Restore error level to previous value
2353 function wfRestoreWarnings() {
2354 wfSuppressWarnings( true );
2357 # Autodetect, convert and provide timestamps of various types
2360 * Unix time - the number of seconds since 1970-01-01 00:00:00 UTC
2362 define( 'TS_UNIX', 0 );
2365 * MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS)
2367 define( 'TS_MW', 1 );
2370 * MySQL DATETIME (YYYY-MM-DD HH:MM:SS)
2372 define( 'TS_DB', 2 );
2375 * RFC 2822 format, for E-mail and HTTP headers
2377 define( 'TS_RFC2822', 3 );
2380 * ISO 8601 format with no timezone: 1986-02-09T20:00:00Z
2382 * This is used by Special:Export
2384 define( 'TS_ISO_8601', 4 );
2387 * An Exif timestamp (YYYY:MM:DD HH:MM:SS)
2389 * @see http://exif.org/Exif2-2.PDF The Exif 2.2 spec, see page 28 for the
2390 * DateTime tag and page 36 for the DateTimeOriginal and
2391 * DateTimeDigitized tags.
2393 define( 'TS_EXIF', 5 );
2396 * Oracle format time.
2398 define( 'TS_ORACLE', 6 );
2401 * Postgres format time.
2403 define( 'TS_POSTGRES', 7 );
2406 * ISO 8601 basic format with no timezone: 19860209T200000Z. This is used by ResourceLoader
2408 define( 'TS_ISO_8601_BASIC', 9 );
2411 * Get a timestamp string in one of various formats
2413 * @param mixed $outputtype A timestamp in one of the supported formats, the
2414 * function will autodetect which format is supplied and act accordingly.
2415 * @param mixed $ts Optional timestamp to convert, default 0 for the current time
2416 * @return string|bool String / false The same date in the format specified in $outputtype or false
2418 function wfTimestamp( $outputtype = TS_UNIX
, $ts = 0 ) {
2420 $timestamp = new MWTimestamp( $ts );
2421 return $timestamp->getTimestamp( $outputtype );
2422 } catch ( TimestampException
$e ) {
2423 wfDebug( "wfTimestamp() fed bogus time value: TYPE=$outputtype; VALUE=$ts\n" );
2429 * Return a formatted timestamp, or null if input is null.
2430 * For dealing with nullable timestamp columns in the database.
2432 * @param int $outputtype
2436 function wfTimestampOrNull( $outputtype = TS_UNIX
, $ts = null ) {
2437 if ( is_null( $ts ) ) {
2440 return wfTimestamp( $outputtype, $ts );
2445 * Convenience function; returns MediaWiki timestamp for the present time.
2449 function wfTimestampNow() {
2451 return wfTimestamp( TS_MW
, time() );
2455 * Check if the operating system is Windows
2457 * @return bool True if it's Windows, false otherwise.
2459 function wfIsWindows() {
2460 static $isWindows = null;
2461 if ( $isWindows === null ) {
2462 $isWindows = substr( php_uname(), 0, 7 ) == 'Windows';
2468 * Check if we are running under HHVM
2472 function wfIsHHVM() {
2473 return defined( 'HHVM_VERSION' );
2477 * Swap two variables
2479 * @deprecated since 1.24
2483 function swap( &$x, &$y ) {
2484 wfDeprecated( __FUNCTION__
, '1.24' );
2491 * Tries to get the system directory for temporary files. First
2492 * $wgTmpDirectory is checked, and then the TMPDIR, TMP, and TEMP
2493 * environment variables are then checked in sequence, and if none are
2494 * set try sys_get_temp_dir().
2496 * NOTE: When possible, use instead the tmpfile() function to create
2497 * temporary files to avoid race conditions on file creation, etc.
2501 function wfTempDir() {
2502 global $wgTmpDirectory;
2504 if ( $wgTmpDirectory !== false ) {
2505 return $wgTmpDirectory;
2508 $tmpDir = array_map( "getenv", array( 'TMPDIR', 'TMP', 'TEMP' ) );
2510 foreach ( $tmpDir as $tmp ) {
2511 if ( $tmp && file_exists( $tmp ) && is_dir( $tmp ) && is_writable( $tmp ) ) {
2515 return sys_get_temp_dir();
2519 * Make directory, and make all parent directories if they don't exist
2521 * @param string $dir Full path to directory to create
2522 * @param int $mode Chmod value to use, default is $wgDirectoryMode
2523 * @param string $caller Optional caller param for debugging.
2524 * @throws MWException
2527 function wfMkdirParents( $dir, $mode = null, $caller = null ) {
2528 global $wgDirectoryMode;
2530 if ( FileBackend
::isStoragePath( $dir ) ) { // sanity
2531 throw new MWException( __FUNCTION__
. " given storage path '$dir'." );
2534 if ( !is_null( $caller ) ) {
2535 wfDebug( "$caller: called wfMkdirParents($dir)\n" );
2538 if ( strval( $dir ) === '' ||
( file_exists( $dir ) && is_dir( $dir ) ) ) {
2542 $dir = str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR
, $dir );
2544 if ( is_null( $mode ) ) {
2545 $mode = $wgDirectoryMode;
2548 // Turn off the normal warning, we're doing our own below
2549 wfSuppressWarnings();
2550 $ok = mkdir( $dir, $mode, true ); // PHP5 <3
2551 wfRestoreWarnings();
2554 //directory may have been created on another request since we last checked
2555 if ( is_dir( $dir ) ) {
2559 // PHP doesn't report the path in its warning message, so add our own to aid in diagnosis.
2560 wfLogWarning( sprintf( "failed to mkdir \"%s\" mode 0%o", $dir, $mode ) );
2566 * Remove a directory and all its content.
2567 * Does not hide error.
2568 * @param string $dir
2570 function wfRecursiveRemoveDir( $dir ) {
2571 wfDebug( __FUNCTION__
. "( $dir )\n" );
2572 // taken from http://de3.php.net/manual/en/function.rmdir.php#98622
2573 if ( is_dir( $dir ) ) {
2574 $objects = scandir( $dir );
2575 foreach ( $objects as $object ) {
2576 if ( $object != "." && $object != ".." ) {
2577 if ( filetype( $dir . '/' . $object ) == "dir" ) {
2578 wfRecursiveRemoveDir( $dir . '/' . $object );
2580 unlink( $dir . '/' . $object );
2590 * @param int $nr The number to format
2591 * @param int $acc The number of digits after the decimal point, default 2
2592 * @param bool $round Whether or not to round the value, default true
2595 function wfPercent( $nr, $acc = 2, $round = true ) {
2596 $ret = sprintf( "%.${acc}f", $nr );
2597 return $round ?
round( $ret, $acc ) . '%' : "$ret%";
2601 * Safety wrapper around ini_get() for boolean settings.
2602 * The values returned from ini_get() are pre-normalized for settings
2603 * set via php.ini or php_flag/php_admin_flag... but *not*
2604 * for those set via php_value/php_admin_value.
2606 * It's fairly common for people to use php_value instead of php_flag,
2607 * which can leave you with an 'off' setting giving a false positive
2608 * for code that just takes the ini_get() return value as a boolean.
2610 * To make things extra interesting, setting via php_value accepts
2611 * "true" and "yes" as true, but php.ini and php_flag consider them false. :)
2612 * Unrecognized values go false... again opposite PHP's own coercion
2613 * from string to bool.
2615 * Luckily, 'properly' set settings will always come back as '0' or '1',
2616 * so we only have to worry about them and the 'improper' settings.
2618 * I frickin' hate PHP... :P
2620 * @param string $setting
2623 function wfIniGetBool( $setting ) {
2624 $val = strtolower( ini_get( $setting ) );
2625 // 'on' and 'true' can't have whitespace around them, but '1' can.
2629 ||
preg_match( "/^\s*[+-]?0*[1-9]/", $val ); // approx C atoi() function
2633 * Windows-compatible version of escapeshellarg()
2634 * Windows doesn't recognise single-quotes in the shell, but the escapeshellarg()
2635 * function puts single quotes in regardless of OS.
2637 * Also fixes the locale problems on Linux in PHP 5.2.6+ (bug backported to
2638 * earlier distro releases of PHP)
2640 * @param string ... strings to escape and glue together, or a single array of strings parameter
2643 function wfEscapeShellArg( /*...*/ ) {
2644 wfInitShellLocale();
2646 $args = func_get_args();
2647 if ( count( $args ) === 1 && is_array( reset( $args ) ) ) {
2648 // If only one argument has been passed, and that argument is an array,
2649 // treat it as a list of arguments
2650 $args = reset( $args );
2655 foreach ( $args as $arg ) {
2662 if ( wfIsWindows() ) {
2663 // Escaping for an MSVC-style command line parser and CMD.EXE
2664 // @codingStandardsIgnoreStart For long URLs
2666 // * http://web.archive.org/web/20020708081031/http://mailman.lyra.org/pipermail/scite-interest/2002-March/000436.html
2667 // * http://technet.microsoft.com/en-us/library/cc723564.aspx
2670 // Double the backslashes before any double quotes. Escape the double quotes.
2671 // @codingStandardsIgnoreEnd
2672 $tokens = preg_split( '/(\\\\*")/', $arg, -1, PREG_SPLIT_DELIM_CAPTURE
);
2675 foreach ( $tokens as $token ) {
2676 if ( $iteration %
2 == 1 ) {
2677 // Delimiter, a double quote preceded by zero or more slashes
2678 $arg .= str_replace( '\\', '\\\\', substr( $token, 0, -1 ) ) . '\\"';
2679 } elseif ( $iteration %
4 == 2 ) {
2680 // ^ in $token will be outside quotes, need to be escaped
2681 $arg .= str_replace( '^', '^^', $token );
2682 } else { // $iteration % 4 == 0
2683 // ^ in $token will appear inside double quotes, so leave as is
2688 // Double the backslashes before the end of the string, because
2689 // we will soon add a quote
2691 if ( preg_match( '/^(.*?)(\\\\+)$/', $arg, $m ) ) {
2692 $arg = $m[1] . str_replace( '\\', '\\\\', $m[2] );
2695 // Add surrounding quotes
2696 $retVal .= '"' . $arg . '"';
2698 $retVal .= escapeshellarg( $arg );
2705 * Check if wfShellExec() is effectively disabled via php.ini config
2707 * @return bool|string False or one of (safemode,disabled)
2710 function wfShellExecDisabled() {
2711 static $disabled = null;
2712 if ( is_null( $disabled ) ) {
2713 if ( wfIniGetBool( 'safe_mode' ) ) {
2714 wfDebug( "wfShellExec can't run in safe_mode, PHP's exec functions are too broken.\n" );
2715 $disabled = 'safemode';
2716 } elseif ( !function_exists( 'proc_open' ) ) {
2717 wfDebug( "proc_open() is disabled\n" );
2718 $disabled = 'disabled';
2727 * Execute a shell command, with time and memory limits mirrored from the PHP
2728 * configuration if supported.
2730 * @param string|string[] $cmd If string, a properly shell-escaped command line,
2731 * or an array of unescaped arguments, in which case each value will be escaped
2732 * Example: [ 'convert', '-font', 'font name' ] would produce "'convert' '-font' 'font name'"
2733 * @param null|mixed &$retval Optional, will receive the program's exit code.
2734 * (non-zero is usually failure). If there is an error from
2735 * read, select, or proc_open(), this will be set to -1.
2736 * @param array $environ Optional environment variables which should be
2737 * added to the executed command environment.
2738 * @param array $limits Optional array with limits(filesize, memory, time, walltime)
2739 * this overwrites the global wgMaxShell* limits.
2740 * @param array $options Array of options:
2741 * - duplicateStderr: Set this to true to duplicate stderr to stdout,
2742 * including errors from limit.sh
2743 * - profileMethod: By default this function will profile based on the calling
2744 * method. Set this to a string for an alternative method to profile from
2746 * @return string Collected stdout as a string
2748 function wfShellExec( $cmd, &$retval = null, $environ = array(),
2749 $limits = array(), $options = array()
2751 global $IP, $wgMaxShellMemory, $wgMaxShellFileSize, $wgMaxShellTime,
2752 $wgMaxShellWallClockTime, $wgShellCgroup;
2754 $disabled = wfShellExecDisabled();
2757 return $disabled == 'safemode' ?
2758 'Unable to run external programs in safe mode.' :
2759 'Unable to run external programs, proc_open() is disabled.';
2762 $includeStderr = isset( $options['duplicateStderr'] ) && $options['duplicateStderr'];
2763 $profileMethod = isset( $options['profileMethod'] ) ?
$options['profileMethod'] : wfGetCaller();
2765 wfInitShellLocale();
2768 foreach ( $environ as $k => $v ) {
2769 if ( wfIsWindows() ) {
2770 /* Surrounding a set in quotes (method used by wfEscapeShellArg) makes the quotes themselves
2771 * appear in the environment variable, so we must use carat escaping as documented in
2772 * http://technet.microsoft.com/en-us/library/cc723564.aspx
2773 * Note however that the quote isn't listed there, but is needed, and the parentheses
2774 * are listed there but doesn't appear to need it.
2776 $envcmd .= "set $k=" . preg_replace( '/([&|()<>^"])/', '^\\1', $v ) . '&& ';
2778 /* Assume this is a POSIX shell, thus required to accept variable assignments before the command
2779 * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_09_01
2781 $envcmd .= "$k=" . escapeshellarg( $v ) . ' ';
2784 if ( is_array( $cmd ) ) {
2785 $cmd = wfEscapeShellArg( $cmd );
2788 $cmd = $envcmd . $cmd;
2790 $useLogPipe = false;
2791 if ( is_executable( '/bin/bash' ) ) {
2792 $time = intval ( isset( $limits['time'] ) ?
$limits['time'] : $wgMaxShellTime );
2793 if ( isset( $limits['walltime'] ) ) {
2794 $wallTime = intval( $limits['walltime'] );
2795 } elseif ( isset( $limits['time'] ) ) {
2798 $wallTime = intval( $wgMaxShellWallClockTime );
2800 $mem = intval ( isset( $limits['memory'] ) ?
$limits['memory'] : $wgMaxShellMemory );
2801 $filesize = intval ( isset( $limits['filesize'] ) ?
$limits['filesize'] : $wgMaxShellFileSize );
2803 if ( $time > 0 ||
$mem > 0 ||
$filesize > 0 ||
$wallTime > 0 ) {
2804 $cmd = '/bin/bash ' . escapeshellarg( "$IP/includes/limit.sh" ) . ' ' .
2805 escapeshellarg( $cmd ) . ' ' .
2807 "MW_INCLUDE_STDERR=" . ( $includeStderr ?
'1' : '' ) . ';' .
2808 "MW_CPU_LIMIT=$time; " .
2809 'MW_CGROUP=' . escapeshellarg( $wgShellCgroup ) . '; ' .
2810 "MW_MEM_LIMIT=$mem; " .
2811 "MW_FILE_SIZE_LIMIT=$filesize; " .
2812 "MW_WALL_CLOCK_LIMIT=$wallTime; " .
2813 "MW_USE_LOG_PIPE=yes"
2816 } elseif ( $includeStderr ) {
2819 } elseif ( $includeStderr ) {
2822 wfDebug( "wfShellExec: $cmd\n" );
2825 0 => array( 'file', 'php://stdin', 'r' ),
2826 1 => array( 'pipe', 'w' ),
2827 2 => array( 'file', 'php://stderr', 'w' ) );
2828 if ( $useLogPipe ) {
2829 $desc[3] = array( 'pipe', 'w' );
2832 $scoped = Profiler
::instance()->scopedProfileIn( __FUNCTION__
. '-' . $profileMethod );
2833 $proc = proc_open( $cmd, $desc, $pipes );
2835 wfDebugLog( 'exec', "proc_open() failed: $cmd" );
2839 $outBuffer = $logBuffer = '';
2840 $emptyArray = array();
2844 // According to the documentation, it is possible for stream_select()
2845 // to fail due to EINTR. I haven't managed to induce this in testing
2846 // despite sending various signals. If it did happen, the error
2847 // message would take the form:
2849 // stream_select(): unable to select [4]: Interrupted system call (max_fd=5)
2851 // where [4] is the value of the macro EINTR and "Interrupted system
2852 // call" is string which according to the Linux manual is "possibly"
2853 // localised according to LC_MESSAGES.
2854 $eintr = defined( 'SOCKET_EINTR' ) ? SOCKET_EINTR
: 4;
2855 $eintrMessage = "stream_select(): unable to select [$eintr]";
2857 // Build a table mapping resource IDs to pipe FDs to work around a
2858 // PHP 5.3 issue in which stream_select() does not preserve array keys
2859 // <https://bugs.php.net/bug.php?id=53427>.
2861 foreach ( $pipes as $fd => $pipe ) {
2862 $fds[(int)$pipe] = $fd;
2869 while ( $running === true ||
$numReadyPipes !== 0 ) {
2871 $status = proc_get_status( $proc );
2872 // If the process has terminated, switch to nonblocking selects
2873 // for getting any data still waiting to be read.
2874 if ( !$status['running'] ) {
2880 $readyPipes = $pipes;
2883 // @codingStandardsIgnoreStart Generic.PHP.NoSilencedErrors.Discouraged
2884 @trigger_error
( '' );
2885 $numReadyPipes = @stream_select
( $readyPipes, $emptyArray, $emptyArray, $timeout );
2886 if ( $numReadyPipes === false ) {
2887 // @codingStandardsIgnoreEnd
2888 $error = error_get_last();
2889 if ( strncmp( $error['message'], $eintrMessage, strlen( $eintrMessage ) ) == 0 ) {
2892 trigger_error( $error['message'], E_USER_WARNING
);
2893 $logMsg = $error['message'];
2897 foreach ( $readyPipes as $pipe ) {
2898 $block = fread( $pipe, 65536 );
2899 $fd = $fds[(int)$pipe];
2900 if ( $block === '' ) {
2902 fclose( $pipes[$fd] );
2903 unset( $pipes[$fd] );
2907 } elseif ( $block === false ) {
2909 $logMsg = "Error reading from pipe";
2911 } elseif ( $fd == 1 ) {
2913 $outBuffer .= $block;
2914 } elseif ( $fd == 3 ) {
2916 $logBuffer .= $block;
2917 if ( strpos( $block, "\n" ) !== false ) {
2918 $lines = explode( "\n", $logBuffer );
2919 $logBuffer = array_pop( $lines );
2920 foreach ( $lines as $line ) {
2921 wfDebugLog( 'exec', $line );
2928 foreach ( $pipes as $pipe ) {
2932 // Use the status previously collected if possible, since proc_get_status()
2933 // just calls waitpid() which will not return anything useful the second time.
2935 $status = proc_get_status( $proc );
2938 if ( $logMsg !== false ) {
2939 // Read/select error
2941 proc_close( $proc );
2942 } elseif ( $status['signaled'] ) {
2943 $logMsg = "Exited with signal {$status['termsig']}";
2944 $retval = 128 +
$status['termsig'];
2945 proc_close( $proc );
2947 if ( $status['running'] ) {
2948 $retval = proc_close( $proc );
2950 $retval = $status['exitcode'];
2951 proc_close( $proc );
2953 if ( $retval == 127 ) {
2954 $logMsg = "Possibly missing executable file";
2955 } elseif ( $retval >= 129 && $retval <= 192 ) {
2956 $logMsg = "Probably exited with signal " . ( $retval - 128 );
2960 if ( $logMsg !== false ) {
2961 wfDebugLog( 'exec', "$logMsg: $cmd" );
2968 * Execute a shell command, returning both stdout and stderr. Convenience
2969 * function, as all the arguments to wfShellExec can become unwieldy.
2971 * @note This also includes errors from limit.sh, e.g. if $wgMaxShellFileSize is exceeded.
2972 * @param string|string[] $cmd If string, a properly shell-escaped command line,
2973 * or an array of unescaped arguments, in which case each value will be escaped
2974 * Example: [ 'convert', '-font', 'font name' ] would produce "'convert' '-font' 'font name'"
2975 * @param null|mixed &$retval Optional, will receive the program's exit code.
2976 * (non-zero is usually failure)
2977 * @param array $environ Optional environment variables which should be
2978 * added to the executed command environment.
2979 * @param array $limits Optional array with limits(filesize, memory, time, walltime)
2980 * this overwrites the global wgMaxShell* limits.
2981 * @return string Collected stdout and stderr as a string
2983 function wfShellExecWithStderr( $cmd, &$retval = null, $environ = array(), $limits = array() ) {
2984 return wfShellExec( $cmd, $retval, $environ, $limits,
2985 array( 'duplicateStderr' => true, 'profileMethod' => wfGetCaller() ) );
2989 * Workaround for http://bugs.php.net/bug.php?id=45132
2990 * escapeshellarg() destroys non-ASCII characters if LANG is not a UTF-8 locale
2992 function wfInitShellLocale() {
2993 static $done = false;
2998 global $wgShellLocale;
2999 if ( !wfIniGetBool( 'safe_mode' ) ) {
3000 putenv( "LC_CTYPE=$wgShellLocale" );
3001 setlocale( LC_CTYPE
, $wgShellLocale );
3006 * Generate a shell-escaped command line string to run a MediaWiki cli script.
3007 * Note that $parameters should be a flat array and an option with an argument
3008 * should consist of two consecutive items in the array (do not use "--option value").
3010 * @param string $script MediaWiki cli script path
3011 * @param array $parameters Arguments and options to the script
3012 * @param array $options Associative array of options:
3013 * 'php': The path to the php executable
3014 * 'wrapper': Path to a PHP wrapper to handle the maintenance script
3017 function wfShellWikiCmd( $script, array $parameters = array(), array $options = array() ) {
3019 // Give site config file a chance to run the script in a wrapper.
3020 // The caller may likely want to call wfBasename() on $script.
3021 Hooks
::run( 'wfShellWikiCmd', array( &$script, &$parameters, &$options ) );
3022 $cmd = isset( $options['php'] ) ?
array( $options['php'] ) : array( $wgPhpCli );
3023 if ( isset( $options['wrapper'] ) ) {
3024 $cmd[] = $options['wrapper'];
3027 // Escape each parameter for shell
3028 return wfEscapeShellArg( array_merge( $cmd, $parameters ) );
3032 * wfMerge attempts to merge differences between three texts.
3033 * Returns true for a clean merge and false for failure or a conflict.
3035 * @param string $old
3036 * @param string $mine
3037 * @param string $yours
3038 * @param string $result
3041 function wfMerge( $old, $mine, $yours, &$result ) {
3044 # This check may also protect against code injection in
3045 # case of broken installations.
3046 wfSuppressWarnings();
3047 $haveDiff3 = $wgDiff3 && file_exists( $wgDiff3 );
3048 wfRestoreWarnings();
3050 if ( !$haveDiff3 ) {
3051 wfDebug( "diff3 not found\n" );
3055 # Make temporary files
3057 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
3058 $mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
3059 $yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
3061 # NOTE: diff3 issues a warning to stderr if any of the files does not end with
3062 # a newline character. To avoid this, we normalize the trailing whitespace before
3063 # creating the diff.
3065 fwrite( $oldtextFile, rtrim( $old ) . "\n" );
3066 fclose( $oldtextFile );
3067 fwrite( $mytextFile, rtrim( $mine ) . "\n" );
3068 fclose( $mytextFile );
3069 fwrite( $yourtextFile, rtrim( $yours ) . "\n" );
3070 fclose( $yourtextFile );
3072 # Check for a conflict
3073 $cmd = wfEscapeShellArg( $wgDiff3, '-a', '--overlap-only', $mytextName,
3074 $oldtextName, $yourtextName );
3075 $handle = popen( $cmd, 'r' );
3077 if ( fgets( $handle, 1024 ) ) {
3085 $cmd = wfEscapeShellArg( $wgDiff3, '-a', '-e', '--merge', $mytextName,
3086 $oldtextName, $yourtextName );
3087 $handle = popen( $cmd, 'r' );
3090 $data = fread( $handle, 8192 );
3091 if ( strlen( $data ) == 0 ) {
3097 unlink( $mytextName );
3098 unlink( $oldtextName );
3099 unlink( $yourtextName );
3101 if ( $result === '' && $old !== '' && !$conflict ) {
3102 wfDebug( "Unexpected null result from diff3. Command: $cmd\n" );
3109 * Returns unified plain-text diff of two texts.
3110 * "Useful" for machine processing of diffs.
3112 * @deprecated since 1.25, use DiffEngine/UnifiedDiffFormatter directly
3114 * @param string $before The text before the changes.
3115 * @param string $after The text after the changes.
3116 * @param string $params Command-line options for the diff command.
3117 * @return string Unified diff of $before and $after
3119 function wfDiff( $before, $after, $params = '-u' ) {
3120 if ( $before == $after ) {
3125 wfSuppressWarnings();
3126 $haveDiff = $wgDiff && file_exists( $wgDiff );
3127 wfRestoreWarnings();
3129 # This check may also protect against code injection in
3130 # case of broken installations.
3132 wfDebug( "diff executable not found\n" );
3133 $diffs = new Diff( explode( "\n", $before ), explode( "\n", $after ) );
3134 $format = new UnifiedDiffFormatter();
3135 return $format->format( $diffs );
3138 # Make temporary files
3140 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
3141 $newtextFile = fopen( $newtextName = tempnam( $td, 'merge-your-' ), 'w' );
3143 fwrite( $oldtextFile, $before );
3144 fclose( $oldtextFile );
3145 fwrite( $newtextFile, $after );
3146 fclose( $newtextFile );
3148 // Get the diff of the two files
3149 $cmd = "$wgDiff " . $params . ' ' . wfEscapeShellArg( $oldtextName, $newtextName );
3151 $h = popen( $cmd, 'r' );
3153 unlink( $oldtextName );
3154 unlink( $newtextName );
3155 throw new Exception( __METHOD__
. '(): popen() failed' );
3161 $data = fread( $h, 8192 );
3162 if ( strlen( $data ) == 0 ) {
3170 unlink( $oldtextName );
3171 unlink( $newtextName );
3173 // Kill the --- and +++ lines. They're not useful.
3174 $diff_lines = explode( "\n", $diff );
3175 if ( isset( $diff_lines[0] ) && strpos( $diff_lines[0], '---' ) === 0 ) {
3176 unset( $diff_lines[0] );
3178 if ( isset( $diff_lines[1] ) && strpos( $diff_lines[1], '+++' ) === 0 ) {
3179 unset( $diff_lines[1] );
3182 $diff = implode( "\n", $diff_lines );
3188 * This function works like "use VERSION" in Perl, the program will die with a
3189 * backtrace if the current version of PHP is less than the version provided
3191 * This is useful for extensions which due to their nature are not kept in sync
3192 * with releases, and might depend on other versions of PHP than the main code
3194 * Note: PHP might die due to parsing errors in some cases before it ever
3195 * manages to call this function, such is life
3197 * @see perldoc -f use
3199 * @param string|int|float $req_ver The version to check, can be a string, an integer, or a float
3200 * @throws MWException
3202 function wfUsePHP( $req_ver ) {
3203 $php_ver = PHP_VERSION
;
3205 if ( version_compare( $php_ver, (string)$req_ver, '<' ) ) {
3206 throw new MWException( "PHP $req_ver required--this is only $php_ver" );
3211 * This function works like "use VERSION" in Perl except it checks the version
3212 * of MediaWiki, the program will die with a backtrace if the current version
3213 * of MediaWiki is less than the version provided.
3215 * This is useful for extensions which due to their nature are not kept in sync
3218 * Note: Due to the behavior of PHP's version_compare() which is used in this
3219 * function, if you want to allow the 'wmf' development versions add a 'c' (or
3220 * any single letter other than 'a', 'b' or 'p') as a post-fix to your
3221 * targeted version number. For example if you wanted to allow any variation
3222 * of 1.22 use `wfUseMW( '1.22c' )`. Using an 'a' or 'b' instead of 'c' will
3223 * not result in the same comparison due to the internal logic of
3224 * version_compare().
3226 * @see perldoc -f use
3228 * @param string|int|float $req_ver The version to check, can be a string, an integer, or a float
3229 * @throws MWException
3231 function wfUseMW( $req_ver ) {
3234 if ( version_compare( $wgVersion, (string)$req_ver, '<' ) ) {
3235 throw new MWException( "MediaWiki $req_ver required--this is only $wgVersion" );
3240 * Return the final portion of a pathname.
3241 * Reimplemented because PHP5's "basename()" is buggy with multibyte text.
3242 * http://bugs.php.net/bug.php?id=33898
3244 * PHP's basename() only considers '\' a pathchar on Windows and Netware.
3245 * We'll consider it so always, as we don't want '\s' in our Unix paths either.
3247 * @param string $path
3248 * @param string $suffix String to remove if present
3251 function wfBaseName( $path, $suffix = '' ) {
3252 if ( $suffix == '' ) {
3255 $encSuffix = '(?:' . preg_quote( $suffix, '#' ) . ')?';
3259 if ( preg_match( "#([^/\\\\]*?){$encSuffix}[/\\\\]*$#", $path, $matches ) ) {
3267 * Generate a relative path name to the given file.
3268 * May explode on non-matching case-insensitive paths,
3269 * funky symlinks, etc.
3271 * @param string $path Absolute destination path including target filename
3272 * @param string $from Absolute source path, directory only
3275 function wfRelativePath( $path, $from ) {
3276 // Normalize mixed input on Windows...
3277 $path = str_replace( '/', DIRECTORY_SEPARATOR
, $path );
3278 $from = str_replace( '/', DIRECTORY_SEPARATOR
, $from );
3280 // Trim trailing slashes -- fix for drive root
3281 $path = rtrim( $path, DIRECTORY_SEPARATOR
);
3282 $from = rtrim( $from, DIRECTORY_SEPARATOR
);
3284 $pieces = explode( DIRECTORY_SEPARATOR
, dirname( $path ) );
3285 $against = explode( DIRECTORY_SEPARATOR
, $from );
3287 if ( $pieces[0] !== $against[0] ) {
3288 // Non-matching Windows drive letters?
3289 // Return a full path.
3293 // Trim off common prefix
3294 while ( count( $pieces ) && count( $against )
3295 && $pieces[0] == $against[0] ) {
3296 array_shift( $pieces );
3297 array_shift( $against );
3300 // relative dots to bump us to the parent
3301 while ( count( $against ) ) {
3302 array_unshift( $pieces, '..' );
3303 array_shift( $against );
3306 array_push( $pieces, wfBaseName( $path ) );
3308 return implode( DIRECTORY_SEPARATOR
, $pieces );
3312 * Convert an arbitrarily-long digit string from one numeric base
3313 * to another, optionally zero-padding to a minimum column width.
3315 * Supports base 2 through 36; digit values 10-36 are represented
3316 * as lowercase letters a-z. Input is case-insensitive.
3318 * @param string $input Input number
3319 * @param int $sourceBase Base of the input number
3320 * @param int $destBase Desired base of the output
3321 * @param int $pad Minimum number of digits in the output (pad with zeroes)
3322 * @param bool $lowercase Whether to output in lowercase or uppercase
3323 * @param string $engine Either "gmp", "bcmath", or "php"
3324 * @return string|bool The output number as a string, or false on error
3326 function wfBaseConvert( $input, $sourceBase, $destBase, $pad = 1,
3327 $lowercase = true, $engine = 'auto'
3329 $input = (string)$input;
3335 $sourceBase != (int)$sourceBase ||
3336 $destBase != (int)$destBase ||
3337 $pad != (int)$pad ||
3339 "/^[" . substr( '0123456789abcdefghijklmnopqrstuvwxyz', 0, $sourceBase ) . "]+$/i",
3346 static $baseChars = array(
3347 10 => 'a', 11 => 'b', 12 => 'c', 13 => 'd', 14 => 'e', 15 => 'f',
3348 16 => 'g', 17 => 'h', 18 => 'i', 19 => 'j', 20 => 'k', 21 => 'l',
3349 22 => 'm', 23 => 'n', 24 => 'o', 25 => 'p', 26 => 'q', 27 => 'r',
3350 28 => 's', 29 => 't', 30 => 'u', 31 => 'v', 32 => 'w', 33 => 'x',
3351 34 => 'y', 35 => 'z',
3353 '0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4, '5' => 5,
3354 '6' => 6, '7' => 7, '8' => 8, '9' => 9, 'a' => 10, 'b' => 11,
3355 'c' => 12, 'd' => 13, 'e' => 14, 'f' => 15, 'g' => 16, 'h' => 17,
3356 'i' => 18, 'j' => 19, 'k' => 20, 'l' => 21, 'm' => 22, 'n' => 23,
3357 'o' => 24, 'p' => 25, 'q' => 26, 'r' => 27, 's' => 28, 't' => 29,
3358 'u' => 30, 'v' => 31, 'w' => 32, 'x' => 33, 'y' => 34, 'z' => 35
3361 if ( extension_loaded( 'gmp' ) && ( $engine == 'auto' ||
$engine == 'gmp' ) ) {
3362 // Removing leading zeros works around broken base detection code in
3363 // some PHP versions (see <https://bugs.php.net/bug.php?id=50175> and
3364 // <https://bugs.php.net/bug.php?id=55398>).
3365 $result = gmp_strval( gmp_init( ltrim( $input, '0' ), $sourceBase ), $destBase );
3366 } elseif ( extension_loaded( 'bcmath' ) && ( $engine == 'auto' ||
$engine == 'bcmath' ) ) {
3368 foreach ( str_split( strtolower( $input ) ) as $char ) {
3369 $decimal = bcmul( $decimal, $sourceBase );
3370 $decimal = bcadd( $decimal, $baseChars[$char] );
3373 // @codingStandardsIgnoreStart Generic.CodeAnalysis.ForLoopWithTestFunctionCall.NotAllowed
3374 for ( $result = ''; bccomp( $decimal, 0 ); $decimal = bcdiv( $decimal, $destBase, 0 ) ) {
3375 $result .= $baseChars[bcmod( $decimal, $destBase )];
3377 // @codingStandardsIgnoreEnd
3379 $result = strrev( $result );
3381 $inDigits = array();
3382 foreach ( str_split( strtolower( $input ) ) as $char ) {
3383 $inDigits[] = $baseChars[$char];
3386 // Iterate over the input, modulo-ing out an output digit
3387 // at a time until input is gone.
3389 while ( $inDigits ) {
3391 $workDigits = array();
3394 foreach ( $inDigits as $digit ) {
3395 $work *= $sourceBase;
3398 if ( $workDigits ||
$work >= $destBase ) {
3399 $workDigits[] = (int)( $work / $destBase );
3404 // All that division leaves us with a remainder,
3405 // which is conveniently our next output digit.
3406 $result .= $baseChars[$work];
3409 $inDigits = $workDigits;
3412 $result = strrev( $result );
3415 if ( !$lowercase ) {
3416 $result = strtoupper( $result );
3419 return str_pad( $result, $pad, '0', STR_PAD_LEFT
);
3423 * Check if there is sufficient entropy in php's built-in session generation
3425 * @return bool True = there is sufficient entropy
3427 function wfCheckEntropy() {
3429 ( wfIsWindows() && version_compare( PHP_VERSION
, '5.3.3', '>=' ) )
3430 ||
ini_get( 'session.entropy_file' )
3432 && intval( ini_get( 'session.entropy_length' ) ) >= 32;
3436 * Override session_id before session startup if php's built-in
3437 * session generation code is not secure.
3439 function wfFixSessionID() {
3440 // If the cookie or session id is already set we already have a session and should abort
3441 if ( isset( $_COOKIE[session_name()] ) ||
session_id() ) {
3445 // PHP's built-in session entropy is enabled if:
3446 // - entropy_file is set or you're on Windows with php 5.3.3+
3447 // - AND entropy_length is > 0
3448 // We treat it as disabled if it doesn't have an entropy length of at least 32
3449 $entropyEnabled = wfCheckEntropy();
3451 // If built-in entropy is not enabled or not sufficient override PHP's
3452 // built in session id generation code
3453 if ( !$entropyEnabled ) {
3454 wfDebug( __METHOD__
. ": PHP's built in entropy is disabled or not sufficient, " .
3455 "overriding session id generation using our cryptrand source.\n" );
3456 session_id( MWCryptRand
::generateHex( 32 ) );
3461 * Reset the session_id
3465 function wfResetSessionID() {
3466 global $wgCookieSecure;
3467 $oldSessionId = session_id();
3468 $cookieParams = session_get_cookie_params();
3469 if ( wfCheckEntropy() && $wgCookieSecure == $cookieParams['secure'] ) {
3470 session_regenerate_id( false );
3474 wfSetupSession( MWCryptRand
::generateHex( 32 ) );
3477 $newSessionId = session_id();
3478 Hooks
::run( 'ResetSessionID', array( $oldSessionId, $newSessionId ) );
3482 * Initialise php session
3484 * @param bool $sessionId
3486 function wfSetupSession( $sessionId = false ) {
3487 global $wgSessionsInMemcached, $wgSessionsInObjectCache, $wgCookiePath, $wgCookieDomain,
3488 $wgCookieSecure, $wgCookieHttpOnly, $wgSessionHandler;
3489 if ( $wgSessionsInObjectCache ||
$wgSessionsInMemcached ) {
3490 ObjectCacheSessionHandler
::install();
3491 } elseif ( $wgSessionHandler && $wgSessionHandler != ini_get( 'session.save_handler' ) ) {
3492 # Only set this if $wgSessionHandler isn't null and session.save_handler
3493 # hasn't already been set to the desired value (that causes errors)
3494 ini_set( 'session.save_handler', $wgSessionHandler );
3496 session_set_cookie_params(
3497 0, $wgCookiePath, $wgCookieDomain, $wgCookieSecure, $wgCookieHttpOnly );
3498 session_cache_limiter( 'private, must-revalidate' );
3500 session_id( $sessionId );
3504 wfSuppressWarnings();
3506 wfRestoreWarnings();
3510 * Get an object from the precompiled serialized directory
3512 * @param string $name
3513 * @return mixed The variable on success, false on failure
3515 function wfGetPrecompiledData( $name ) {
3518 $file = "$IP/serialized/$name";
3519 if ( file_exists( $file ) ) {
3520 $blob = file_get_contents( $file );
3522 return unserialize( $blob );
3531 * @param string $args,...
3534 function wfMemcKey( /*...*/ ) {
3535 global $wgCachePrefix;
3536 $prefix = $wgCachePrefix === false ?
wfWikiID() : $wgCachePrefix;
3537 $args = func_get_args();
3538 $key = $prefix . ':' . implode( ':', $args );
3539 $key = str_replace( ' ', '_', $key );
3544 * Get a cache key for a foreign DB
3547 * @param string $prefix
3548 * @param string $args,...
3551 function wfForeignMemcKey( $db, $prefix /*...*/ ) {
3552 $args = array_slice( func_get_args(), 2 );
3554 $key = "$db-$prefix:" . implode( ':', $args );
3556 $key = $db . ':' . implode( ':', $args );
3558 return str_replace( ' ', '_', $key );
3562 * Get an ASCII string identifying this wiki
3563 * This is used as a prefix in memcached keys
3567 function wfWikiID() {
3568 global $wgDBprefix, $wgDBname;
3569 if ( $wgDBprefix ) {
3570 return "$wgDBname-$wgDBprefix";
3577 * Split a wiki ID into DB name and table prefix
3579 * @param string $wiki
3583 function wfSplitWikiID( $wiki ) {
3584 $bits = explode( '-', $wiki, 2 );
3585 if ( count( $bits ) < 2 ) {
3592 * Get a Database object.
3594 * @param int $db Index of the connection to get. May be DB_MASTER for the
3595 * master (for write queries), DB_SLAVE for potentially lagged read
3596 * queries, or an integer >= 0 for a particular server.
3598 * @param string|string[] $groups Query groups. An array of group names that this query
3599 * belongs to. May contain a single string if the query is only
3602 * @param string|bool $wiki The wiki ID, or false for the current wiki
3604 * Note: multiple calls to wfGetDB(DB_SLAVE) during the course of one request
3605 * will always return the same object, unless the underlying connection or load
3606 * balancer is manually destroyed.
3608 * Note 2: use $this->getDB() in maintenance scripts that may be invoked by
3609 * updater to ensure that a proper database is being updated.
3611 * @return DatabaseBase
3613 function wfGetDB( $db, $groups = array(), $wiki = false ) {
3614 return wfGetLB( $wiki )->getConnection( $db, $groups, $wiki );
3618 * Get a load balancer object.
3620 * @param string|bool $wiki Wiki ID, or false for the current wiki
3621 * @return LoadBalancer
3623 function wfGetLB( $wiki = false ) {
3624 return wfGetLBFactory()->getMainLB( $wiki );
3628 * Get the load balancer factory object
3632 function wfGetLBFactory() {
3633 return LBFactory
::singleton();
3638 * Shortcut for RepoGroup::singleton()->findFile()
3640 * @param string $title String or Title object
3641 * @param array $options Associative array of options (see RepoGroup::findFile)
3642 * @return File|bool File, or false if the file does not exist
3644 function wfFindFile( $title, $options = array() ) {
3645 return RepoGroup
::singleton()->findFile( $title, $options );
3649 * Get an object referring to a locally registered file.
3650 * Returns a valid placeholder object if the file does not exist.
3652 * @param Title|string $title
3653 * @return LocalFile|null A File, or null if passed an invalid Title
3655 function wfLocalFile( $title ) {
3656 return RepoGroup
::singleton()->getLocalRepo()->newFile( $title );
3660 * Should low-performance queries be disabled?
3663 * @codeCoverageIgnore
3665 function wfQueriesMustScale() {
3666 global $wgMiserMode;
3668 ||
( SiteStats
::pages() > 100000
3669 && SiteStats
::edits() > 1000000
3670 && SiteStats
::users() > 10000 );
3674 * Get the path to a specified script file, respecting file
3675 * extensions; this is a wrapper around $wgScriptExtension etc.
3676 * except for 'index' and 'load' which use $wgScript/$wgLoadScript
3678 * @param string $script Script filename, sans extension
3681 function wfScript( $script = 'index' ) {
3682 global $wgScriptPath, $wgScriptExtension, $wgScript, $wgLoadScript;
3683 if ( $script === 'index' ) {
3685 } elseif ( $script === 'load' ) {
3686 return $wgLoadScript;
3688 return "{$wgScriptPath}/{$script}{$wgScriptExtension}";
3693 * Get the script URL.
3695 * @return string Script URL
3697 function wfGetScriptUrl() {
3698 if ( isset( $_SERVER['SCRIPT_NAME'] ) ) {
3700 # as it was called, minus the query string.
3702 # Some sites use Apache rewrite rules to handle subdomains,
3703 # and have PHP set up in a weird way that causes PHP_SELF
3704 # to contain the rewritten URL instead of the one that the
3705 # outside world sees.
3707 # If in this mode, use SCRIPT_URL instead, which mod_rewrite
3708 # provides containing the "before" URL.
3709 return $_SERVER['SCRIPT_NAME'];
3711 return $_SERVER['URL'];
3716 * Convenience function converts boolean values into "true"
3717 * or "false" (string) values
3719 * @param bool $value
3722 function wfBoolToStr( $value ) {
3723 return $value ?
'true' : 'false';
3727 * Get a platform-independent path to the null file, e.g. /dev/null
3731 function wfGetNull() {
3732 return wfIsWindows() ?
'NUL' : '/dev/null';
3736 * Waits for the slaves to catch up to the master position
3738 * Use this when updating very large numbers of rows, as in maintenance scripts,
3739 * to avoid causing too much lag. Of course, this is a no-op if there are no slaves.
3741 * By default this waits on the main DB cluster of the current wiki.
3742 * If $cluster is set to "*" it will wait on all DB clusters, including
3743 * external ones. If the lag being waiting on is caused by the code that
3744 * does this check, it makes since to use $ifWritesSince, particularly if
3745 * cluster is "*", to avoid excess overhead.
3747 * Never call this function after a big DB write that is still in a transaction.
3748 * This only makes sense after the possible lag inducing changes were committed.
3750 * @param float|null $ifWritesSince Only wait if writes were done since this UNIX timestamp
3751 * @param string|bool $wiki Wiki identifier accepted by wfGetLB
3752 * @param string|bool $cluster Cluster name accepted by LBFactory. Default: false.
3753 * @param int|null $timeout Max wait time. Default: 1 day (cli), ~10 seconds (web)
3754 * @return bool Success (able to connect and no timeouts reached)
3756 function wfWaitForSlaves(
3757 $ifWritesSince = null, $wiki = false, $cluster = false, $timeout = null
3759 // B/C: first argument used to be "max seconds of lag"; ignore such values
3760 $ifWritesSince = ( $ifWritesSince > 1e9
) ?
$ifWritesSince : null;
3762 if ( $timeout === null ) {
3763 $timeout = ( PHP_SAPI
=== 'cli' ) ?
86400 : 10;
3766 // Figure out which clusters need to be checked
3768 if ( $cluster === '*' ) {
3769 wfGetLBFactory()->forEachLB( function ( LoadBalancer
$lb ) use ( &$lbs ) {
3772 } elseif ( $cluster !== false ) {
3773 $lbs[] = wfGetLBFactory()->getExternalLB( $cluster );
3775 $lbs[] = wfGetLB( $wiki );
3778 // Get all the master positions of applicable DBs right now.
3779 // This can be faster since waiting on one cluster reduces the
3780 // time needed to wait on the next clusters.
3781 $masterPositions = array_fill( 0, count( $lbs ), false );
3782 foreach ( $lbs as $i => $lb ) {
3783 // bug 27975 - Don't try to wait for slaves if there are none
3784 // Prevents permission error when getting master position
3785 if ( $lb->getServerCount() > 1 ) {
3786 if ( $ifWritesSince && !$lb->hasMasterConnection() ) {
3787 continue; // assume no writes done
3789 // Use the empty string to not trigger selectDB() since the connection
3790 // may have been to a server that does not have a DB for the current wiki.
3791 $dbw = $lb->getConnection( DB_MASTER
, array(), '' );
3792 if ( $ifWritesSince && $dbw->lastDoneWrites() < $ifWritesSince ) {
3793 continue; // no writes since the last wait
3795 $masterPositions[$i] = $dbw->getMasterPos();
3800 foreach ( $lbs as $i => $lb ) {
3801 if ( $masterPositions[$i] ) {
3802 // The DBMS may not support getMasterPos() or the whole
3803 // load balancer might be fake (e.g. $wgAllDBsAreLocalhost).
3804 $ok = $lb->waitForAll( $masterPositions[$i], $timeout ) && $ok;
3812 * Count down from $seconds to zero on the terminal, with a one-second pause
3813 * between showing each number. For use in command-line scripts.
3815 * @codeCoverageIgnore
3816 * @param int $seconds
3818 function wfCountDown( $seconds ) {
3819 for ( $i = $seconds; $i >= 0; $i-- ) {
3820 if ( $i != $seconds ) {
3821 echo str_repeat( "\x08", strlen( $i +
1 ) );
3833 * Replace all invalid characters with -
3834 * Additional characters can be defined in $wgIllegalFileChars (see bug 20489)
3835 * By default, $wgIllegalFileChars = ':'
3837 * @param string $name Filename to process
3840 function wfStripIllegalFilenameChars( $name ) {
3841 global $wgIllegalFileChars;
3842 $illegalFileChars = $wgIllegalFileChars ?
"|[" . $wgIllegalFileChars . "]" : '';
3843 $name = wfBaseName( $name );
3844 $name = preg_replace(
3845 "/[^" . Title
::legalChars() . "]" . $illegalFileChars . "/",
3853 * Set PHP's memory limit to the larger of php.ini or $wgMemoryLimit;
3855 * @return int Value the memory limit was set to.
3857 function wfMemoryLimit() {
3858 global $wgMemoryLimit;
3859 $memlimit = wfShorthandToInteger( ini_get( 'memory_limit' ) );
3860 if ( $memlimit != -1 ) {
3861 $conflimit = wfShorthandToInteger( $wgMemoryLimit );
3862 if ( $conflimit == -1 ) {
3863 wfDebug( "Removing PHP's memory limit\n" );
3864 wfSuppressWarnings();
3865 ini_set( 'memory_limit', $conflimit );
3866 wfRestoreWarnings();
3868 } elseif ( $conflimit > $memlimit ) {
3869 wfDebug( "Raising PHP's memory limit to $conflimit bytes\n" );
3870 wfSuppressWarnings();
3871 ini_set( 'memory_limit', $conflimit );
3872 wfRestoreWarnings();
3880 * Converts shorthand byte notation to integer form
3882 * @param string $string
3885 function wfShorthandToInteger( $string = '' ) {
3886 $string = trim( $string );
3887 if ( $string === '' ) {
3890 $last = $string[strlen( $string ) - 1];
3891 $val = intval( $string );
3896 // break intentionally missing
3900 // break intentionally missing
3910 * Get the normalised IETF language tag
3911 * See unit test for examples.
3913 * @param string $code The language code.
3914 * @return string The language code which complying with BCP 47 standards.
3916 function wfBCP47( $code ) {
3917 $codeSegment = explode( '-', $code );
3919 foreach ( $codeSegment as $segNo => $seg ) {
3920 // when previous segment is x, it is a private segment and should be lc
3921 if ( $segNo > 0 && strtolower( $codeSegment[( $segNo - 1 )] ) == 'x' ) {
3922 $codeBCP[$segNo] = strtolower( $seg );
3923 // ISO 3166 country code
3924 } elseif ( ( strlen( $seg ) == 2 ) && ( $segNo > 0 ) ) {
3925 $codeBCP[$segNo] = strtoupper( $seg );
3926 // ISO 15924 script code
3927 } elseif ( ( strlen( $seg ) == 4 ) && ( $segNo > 0 ) ) {
3928 $codeBCP[$segNo] = ucfirst( strtolower( $seg ) );
3929 // Use lowercase for other cases
3931 $codeBCP[$segNo] = strtolower( $seg );
3934 $langCode = implode( '-', $codeBCP );
3939 * Get a cache object.
3941 * @param int $inputType Cache type, one of the CACHE_* constants.
3944 function wfGetCache( $inputType ) {
3945 return ObjectCache
::getInstance( $inputType );
3949 * Get the main cache object
3953 function wfGetMainCache() {
3954 global $wgMainCacheType;
3955 return ObjectCache
::getInstance( $wgMainCacheType );
3959 * Get the cache object used by the message cache
3963 function wfGetMessageCacheStorage() {
3964 global $wgMessageCacheType;
3965 return ObjectCache
::getInstance( $wgMessageCacheType );
3969 * Get the cache object used by the parser cache
3973 function wfGetParserCacheStorage() {
3974 global $wgParserCacheType;
3975 return ObjectCache
::getInstance( $wgParserCacheType );
3979 * Call hook functions defined in $wgHooks
3981 * @param string $event Event name
3982 * @param array $args Parameters passed to hook functions
3983 * @param string|null $deprecatedVersion Optionally mark hook as deprecated with version number
3985 * @return bool True if no handler aborted the hook
3986 * @deprecated 1.25 - use Hooks::run
3988 function wfRunHooks( $event, array $args = array(), $deprecatedVersion = null ) {
3989 return Hooks
::run( $event, $args, $deprecatedVersion );
3993 * Wrapper around php's unpack.
3995 * @param string $format The format string (See php's docs)
3996 * @param string $data A binary string of binary data
3997 * @param int|bool $length The minimum length of $data or false. This is to
3998 * prevent reading beyond the end of $data. false to disable the check.
4000 * Also be careful when using this function to read unsigned 32 bit integer
4001 * because php might make it negative.
4003 * @throws MWException If $data not long enough, or if unpack fails
4004 * @return array Associative array of the extracted data
4006 function wfUnpack( $format, $data, $length = false ) {
4007 if ( $length !== false ) {
4008 $realLen = strlen( $data );
4009 if ( $realLen < $length ) {
4010 throw new MWException( "Tried to use wfUnpack on a "
4011 . "string of length $realLen, but needed one "
4012 . "of at least length $length."
4017 wfSuppressWarnings();
4018 $result = unpack( $format, $data );
4019 wfRestoreWarnings();
4021 if ( $result === false ) {
4022 // If it cannot extract the packed data.
4023 throw new MWException( "unpack could not unpack binary data" );
4029 * Determine if an image exists on the 'bad image list'.
4031 * The format of MediaWiki:Bad_image_list is as follows:
4032 * * Only list items (lines starting with "*") are considered
4033 * * The first link on a line must be a link to a bad image
4034 * * Any subsequent links on the same line are considered to be exceptions,
4035 * i.e. articles where the image may occur inline.
4037 * @param string $name The image name to check
4038 * @param Title|bool $contextTitle The page on which the image occurs, if known
4039 * @param string $blacklist Wikitext of a file blacklist
4042 function wfIsBadImage( $name, $contextTitle = false, $blacklist = null ) {
4043 static $badImageCache = null; // based on bad_image_list msg
4046 $redirectTitle = RepoGroup
::singleton()->checkRedirect( Title
::makeTitle( NS_FILE
, $name ) );
4047 if ( $redirectTitle ) {
4048 $name = $redirectTitle->getDBkey();
4051 # Run the extension hook
4053 if ( !Hooks
::run( 'BadImage', array( $name, &$bad ) ) ) {
4057 $cacheable = ( $blacklist === null );
4058 if ( $cacheable && $badImageCache !== null ) {
4059 $badImages = $badImageCache;
4060 } else { // cache miss
4061 if ( $blacklist === null ) {
4062 $blacklist = wfMessage( 'bad_image_list' )->inContentLanguage()->plain(); // site list
4064 # Build the list now
4065 $badImages = array();
4066 $lines = explode( "\n", $blacklist );
4067 foreach ( $lines as $line ) {
4069 if ( substr( $line, 0, 1 ) !== '*' ) {
4075 if ( !preg_match_all( '/\[\[:?(.*?)\]\]/', $line, $m ) ) {
4079 $exceptions = array();
4080 $imageDBkey = false;
4081 foreach ( $m[1] as $i => $titleText ) {
4082 $title = Title
::newFromText( $titleText );
4083 if ( !is_null( $title ) ) {
4085 $imageDBkey = $title->getDBkey();
4087 $exceptions[$title->getPrefixedDBkey()] = true;
4092 if ( $imageDBkey !== false ) {
4093 $badImages[$imageDBkey] = $exceptions;
4097 $badImageCache = $badImages;
4101 $contextKey = $contextTitle ?
$contextTitle->getPrefixedDBkey() : false;
4102 $bad = isset( $badImages[$name] ) && !isset( $badImages[$name][$contextKey] );
4107 * Determine whether the client at a given source IP is likely to be able to
4108 * access the wiki via HTTPS.
4110 * @param string $ip The IPv4/6 address in the normal human-readable form
4113 function wfCanIPUseHTTPS( $ip ) {
4115 Hooks
::run( 'CanIPUseHTTPS', array( $ip, &$canDo ) );
4120 * Determine input string is represents as infinity
4122 * @param string $str The string to determine
4126 function wfIsInfinity( $str ) {
4127 $infinityValues = array( 'infinite', 'indefinite', 'infinity', 'never' );
4128 return in_array( $str, $infinityValues );
4132 * Work out the IP address based on various globals
4133 * For trusted proxies, use the XFF client IP (first of the chain)
4135 * @deprecated since 1.19; call $wgRequest->getIP() directly.
4138 function wfGetIP() {
4139 wfDeprecated( __METHOD__
, '1.19' );
4141 return $wgRequest->getIP();
4145 * Checks if an IP is a trusted proxy provider.
4146 * Useful to tell if X-Forwarded-For data is possibly bogus.
4147 * Squid cache servers for the site are whitelisted.
4148 * @deprecated Since 1.24, use IP::isTrustedProxy()
4153 function wfIsTrustedProxy( $ip ) {
4154 wfDeprecated( __METHOD__
, '1.24' );
4155 return IP
::isTrustedProxy( $ip );
4159 * Checks if an IP matches a proxy we've configured.
4160 * @deprecated Since 1.24, use IP::isConfiguredProxy()
4164 * @since 1.23 Supports CIDR ranges in $wgSquidServersNoPurge
4166 function wfIsConfiguredProxy( $ip ) {
4167 wfDeprecated( __METHOD__
, '1.24' );
4168 return IP
::isConfiguredProxy( $ip );
4172 * Returns true if these thumbnail parameters match one that MediaWiki
4173 * requests from file description pages and/or parser output.
4175 * $params is considered non-standard if they involve a non-standard
4176 * width or any non-default parameters aside from width and page number.
4177 * The number of possible files with standard parameters is far less than
4178 * that of all combinations; rate-limiting for them can thus be more generious.
4181 * @param array $params
4183 * @since 1.24 Moved from thumb.php to GlobalFunctions in 1.25
4185 function wfThumbIsStandard( File
$file, array $params ) {
4186 global $wgThumbLimits, $wgImageLimits, $wgResponsiveImages;
4188 $multipliers = array( 1 );
4189 if ( $wgResponsiveImages ) {
4190 // These available sizes are hardcoded currently elsewhere in MediaWiki.
4191 // @see Linker::processResponsiveImages
4192 $multipliers[] = 1.5;
4196 $handler = $file->getHandler();
4197 if ( !$handler ||
!isset( $params['width'] ) ) {
4201 $basicParams = array();
4202 if ( isset( $params['page'] ) ) {
4203 $basicParams['page'] = $params['page'];
4206 $thumbLimits = array();
4207 $imageLimits = array();
4208 // Expand limits to account for multipliers
4209 foreach ( $multipliers as $multiplier ) {
4210 $thumbLimits = array_merge( $thumbLimits, array_map(
4211 function ( $width ) use ( $multiplier ) {
4212 return round( $width * $multiplier );
4215 $imageLimits = array_merge( $imageLimits, array_map(
4216 function ( $pair ) use ( $multiplier ) {
4218 round( $pair[0] * $multiplier ),
4219 round( $pair[1] * $multiplier ),
4225 // Check if the width matches one of $wgThumbLimits
4226 if ( in_array( $params['width'], $thumbLimits ) ) {
4227 $normalParams = $basicParams +
array( 'width' => $params['width'] );
4228 // Append any default values to the map (e.g. "lossy", "lossless", ...)
4229 $handler->normaliseParams( $file, $normalParams );
4231 // If not, then check if the width matchs one of $wgImageLimits
4233 foreach ( $imageLimits as $pair ) {
4234 $normalParams = $basicParams +
array( 'width' => $pair[0], 'height' => $pair[1] );
4235 // Decide whether the thumbnail should be scaled on width or height.
4236 // Also append any default values to the map (e.g. "lossy", "lossless", ...)
4237 $handler->normaliseParams( $file, $normalParams );
4238 // Check if this standard thumbnail size maps to the given width
4239 if ( $normalParams['width'] == $params['width'] ) {
4245 return false; // not standard for description pages
4249 // Check that the given values for non-page, non-width, params are just defaults
4250 foreach ( $params as $key => $value ) {
4251 if ( !isset( $normalParams[$key] ) ||
$normalParams[$key] != $value ) {