queue( $path );
}
/**
* Load multiple extensions at once
*
* Same as wfLoadExtension, but more efficient if you
* are loading multiple extensions.
*
* If you want to specify custom paths, you should interact with
* ExtensionRegistry directly.
*
* @see wfLoadExtension
* @param string[] $exts Array of extension names to load
* @since 1.25
*/
function wfLoadExtensions( array $exts ) {
global $wgExtensionDirectory;
$registry = ExtensionRegistry::getInstance();
foreach ( $exts as $ext ) {
$registry->queue( "$wgExtensionDirectory/$ext/extension.json" );
}
}
/**
* Load a skin
*
* @see wfLoadExtension
* @param string $skin Name of the extension to load
* @param string|null $path Absolute path of where to find the skin.json file
* @since 1.25
*/
function wfLoadSkin( $skin, $path = null ) {
if ( !$path ) {
global $wgStyleDirectory;
$path = "$wgStyleDirectory/$skin/skin.json";
}
ExtensionRegistry::getInstance()->queue( $path );
}
/**
* Load multiple skins at once
*
* @see wfLoadExtensions
* @param string[] $skins Array of extension names to load
* @since 1.25
*/
function wfLoadSkins( array $skins ) {
global $wgStyleDirectory;
$registry = ExtensionRegistry::getInstance();
foreach ( $skins as $skin ) {
$registry->queue( "$wgStyleDirectory/$skin/skin.json" );
}
}
/**
* Like array_diff( $a, $b ) except that it works with two-dimensional arrays.
* @param array $a
* @param array $b
* @return array
*/
function wfArrayDiff2( $a, $b ) {
return array_udiff( $a, $b, 'wfArrayDiff2_cmp' );
}
/**
* @param array|string $a
* @param array|string $b
* @return int
*/
function wfArrayDiff2_cmp( $a, $b ) {
if ( is_string( $a ) && is_string( $b ) ) {
return strcmp( $a, $b );
} elseif ( count( $a ) !== count( $b ) ) {
return count( $a ) <=> count( $b );
} else {
reset( $a );
reset( $b );
while ( key( $a ) !== null && key( $b ) !== null ) {
$valueA = current( $a );
$valueB = current( $b );
$cmp = strcmp( $valueA, $valueB );
if ( $cmp !== 0 ) {
return $cmp;
}
next( $a );
next( $b );
}
return 0;
}
}
/**
* Appends to second array if $value differs from that in $default
*
* @param string|int $key
* @param mixed $value
* @param mixed $default
* @param array &$changed Array to alter
* @throws MWException
*/
function wfAppendToArrayIfNotDefault( $key, $value, $default, &$changed ) {
if ( is_null( $changed ) ) {
throw new MWException( 'GlobalFunctions::wfAppendToArrayIfNotDefault got null' );
}
if ( $default[$key] !== $value ) {
$changed[$key] = $value;
}
}
/**
* Merge arrays in the style of getUserPermissionsErrors, with duplicate removal
* e.g.
* wfMergeErrorArrays(
* [ [ 'x' ] ],
* [ [ 'x', '2' ] ],
* [ [ 'x' ] ],
* [ [ 'y' ] ]
* );
* returns:
* [
* [ 'x', '2' ],
* [ 'x' ],
* [ 'y' ]
* ]
*
* @param array ...$args
* @return array
*/
function wfMergeErrorArrays( ...$args ) {
$out = [];
foreach ( $args as $errors ) {
foreach ( $errors as $params ) {
$originalParams = $params;
if ( $params[0] instanceof MessageSpecifier ) {
$msg = $params[0];
$params = array_merge( [ $msg->getKey() ], $msg->getParams() );
}
# @todo FIXME: Sometimes get nested arrays for $params,
# which leads to E_NOTICEs
$spec = implode( "\t", $params );
$out[$spec] = $originalParams;
}
}
return array_values( $out );
}
/**
* Insert array into another array after the specified *KEY*
*
* @param array $array The array.
* @param array $insert The array to insert.
* @param mixed $after The key to insert after. Callers need to make sure the key is set.
* @return array
*/
function wfArrayInsertAfter( array $array, array $insert, $after ) {
// Find the offset of the element to insert after.
$keys = array_keys( $array );
$offsetByKey = array_flip( $keys );
$offset = $offsetByKey[$after];
// Insert at the specified offset
$before = array_slice( $array, 0, $offset + 1, true );
$after = array_slice( $array, $offset + 1, count( $array ) - $offset, true );
$output = $before + $insert + $after;
return $output;
}
/**
* Recursively converts the parameter (an object) to an array with the same data
*
* @param object|array $objOrArray
* @param bool $recursive
* @return array
*/
function wfObjectToArray( $objOrArray, $recursive = true ) {
$array = [];
if ( is_object( $objOrArray ) ) {
$objOrArray = get_object_vars( $objOrArray );
}
foreach ( $objOrArray as $key => $value ) {
if ( $recursive && ( is_object( $value ) || is_array( $value ) ) ) {
$value = wfObjectToArray( $value );
}
$array[$key] = $value;
}
return $array;
}
/**
* Get a random decimal value in the domain of [0, 1), in a way
* not likely to give duplicate values for any realistic
* number of articles.
*
* @note This is designed for use in relation to Special:RandomPage
* and the page_random database field.
*
* @return string
*/
function wfRandom() {
// The maximum random value is "only" 2^31-1, so get two random
// values to reduce the chance of dupes
$max = mt_getrandmax() + 1;
$rand = number_format( ( mt_rand() * $max + mt_rand() ) / $max / $max, 12, '.', '' );
return $rand;
}
/**
* Get a random string containing a number of pseudo-random hex characters.
*
* @note This is not secure, if you are trying to generate some sort
* of token please use MWCryptRand instead.
*
* @param int $length The length of the string to generate
* @return string
* @since 1.20
*/
function wfRandomString( $length = 32 ) {
$str = '';
for ( $n = 0; $n < $length; $n += 7 ) {
$str .= sprintf( '%07x', mt_rand() & 0xfffffff );
}
return substr( $str, 0, $length );
}
/**
* We want some things to be included as literal characters in our title URLs
* for prettiness, which urlencode encodes by default. According to RFC 1738,
* all of the following should be safe:
*
* ;:@&=$-_.+!*'(),
*
* RFC 1738 says ~ is unsafe, however RFC 3986 considers it an unreserved
* character which should not be encoded. More importantly, google chrome
* always converts %7E back to ~, and converting it in this function can
* cause a redirect loop (T105265).
*
* But + is not safe because it's used to indicate a space; &= are only safe in
* paths and not in queries (and we don't distinguish here); ' seems kind of
* scary; and urlencode() doesn't touch -_. to begin with. Plus, although /
* is reserved, we don't care. So the list we unescape is:
*
* ;:@$!*(),/~
*
* However, IIS7 redirects fail when the url contains a colon (see T24709),
* so no fancy : for IIS7.
*
* %2F in the page titles seems to fatally break for some reason.
*
* @param string $s
* @return string
*/
function wfUrlencode( $s ) {
static $needle;
if ( is_null( $s ) ) {
// Reset $needle for testing.
$needle = null;
return '';
}
if ( is_null( $needle ) ) {
$needle = [ '%3B', '%40', '%24', '%21', '%2A', '%28', '%29', '%2C', '%2F', '%7E' ];
if ( !isset( $_SERVER['SERVER_SOFTWARE'] ) ||
( strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7' ) === false )
) {
$needle[] = '%3A';
}
}
$s = urlencode( $s );
$s = str_ireplace(
$needle,
[ ';', '@', '$', '!', '*', '(', ')', ',', '/', '~', ':' ],
$s
);
return $s;
}
/**
* This function takes one or two arrays as input, and returns a CGI-style string, e.g.
* "days=7&limit=100". Options in the first array override options in the second.
* Options set to null or false will not be output.
*
* @param array $array1 ( String|Array )
* @param array|null $array2 ( String|Array )
* @param string $prefix
* @return string
*/
function wfArrayToCgi( $array1, $array2 = null, $prefix = '' ) {
if ( !is_null( $array2 ) ) {
$array1 = $array1 + $array2;
}
$cgi = '';
foreach ( $array1 as $key => $value ) {
if ( !is_null( $value ) && $value !== false ) {
if ( $cgi != '' ) {
$cgi .= '&';
}
if ( $prefix !== '' ) {
$key = $prefix . "[$key]";
}
if ( is_array( $value ) ) {
$firstTime = true;
foreach ( $value as $k => $v ) {
$cgi .= $firstTime ? '' : '&';
if ( is_array( $v ) ) {
$cgi .= wfArrayToCgi( $v, null, $key . "[$k]" );
} else {
$cgi .= urlencode( $key . "[$k]" ) . '=' . urlencode( $v );
}
$firstTime = false;
}
} else {
if ( is_object( $value ) ) {
$value = $value->__toString();
}
$cgi .= urlencode( $key ) . '=' . urlencode( $value );
}
}
}
return $cgi;
}
/**
* This is the logical opposite of wfArrayToCgi(): it accepts a query string as
* its argument and returns the same string in array form. This allows compatibility
* with legacy functions that accept raw query strings instead of nice
* arrays. Of course, keys and values are urldecode()d.
*
* @param string $query Query string
* @return string[] Array version of input
*/
function wfCgiToArray( $query ) {
if ( isset( $query[0] ) && $query[0] == '?' ) {
$query = substr( $query, 1 );
}
$bits = explode( '&', $query );
$ret = [];
foreach ( $bits as $bit ) {
if ( $bit === '' ) {
continue;
}
if ( strpos( $bit, '=' ) === false ) {
// Pieces like &qwerty become 'qwerty' => '' (at least this is what php does)
$key = $bit;
$value = '';
} else {
list( $key, $value ) = explode( '=', $bit );
}
$key = urldecode( $key );
$value = urldecode( $value );
if ( strpos( $key, '[' ) !== false ) {
$keys = array_reverse( explode( '[', $key ) );
$key = array_pop( $keys );
$temp = $value;
foreach ( $keys as $k ) {
$k = substr( $k, 0, -1 );
$temp = [ $k => $temp ];
}
if ( isset( $ret[$key] ) ) {
$ret[$key] = array_merge( $ret[$key], $temp );
} else {
$ret[$key] = $temp;
}
} else {
$ret[$key] = $value;
}
}
return $ret;
}
/**
* Append a query string to an existing URL, which may or may not already
* have query string parameters already. If so, they will be combined.
*
* @param string $url
* @param string|string[] $query String or associative array
* @return string
*/
function wfAppendQuery( $url, $query ) {
if ( is_array( $query ) ) {
$query = wfArrayToCgi( $query );
}
if ( $query != '' ) {
// Remove the fragment, if there is one
$fragment = false;
$hashPos = strpos( $url, '#' );
if ( $hashPos !== false ) {
$fragment = substr( $url, $hashPos );
$url = substr( $url, 0, $hashPos );
}
// Add parameter
if ( strpos( $url, '?' ) === false ) {
$url .= '?';
} else {
$url .= '&';
}
$url .= $query;
// Put the fragment back
if ( $fragment !== false ) {
$url .= $fragment;
}
}
return $url;
}
/**
* Expand a potentially local URL to a fully-qualified URL. Assumes $wgServer
* is correct.
*
* The meaning of the PROTO_* constants is as follows:
* PROTO_HTTP: Output a URL starting with http://
* PROTO_HTTPS: Output a URL starting with https://
* PROTO_RELATIVE: Output a URL starting with // (protocol-relative URL)
* PROTO_CURRENT: Output a URL starting with either http:// or https:// , depending
* on which protocol was used for the current incoming request
* PROTO_CANONICAL: For URLs without a domain, like /w/index.php , use $wgCanonicalServer.
* For protocol-relative URLs, use the protocol of $wgCanonicalServer
* PROTO_INTERNAL: Like PROTO_CANONICAL, but uses $wgInternalServer instead of $wgCanonicalServer
*
* @todo this won't work with current-path-relative URLs
* like "subdir/foo.html", etc.
*
* @param string $url Either fully-qualified or a local path + query
* @param string|int|null $defaultProto One of the PROTO_* constants. Determines the
* protocol to use if $url or $wgServer is protocol-relative
* @return string|false Fully-qualified URL, current-path-relative URL or false if
* no valid URL can be constructed
*/
function wfExpandUrl( $url, $defaultProto = PROTO_CURRENT ) {
global $wgServer, $wgCanonicalServer, $wgInternalServer, $wgRequest,
$wgHttpsPort;
if ( $defaultProto === PROTO_CANONICAL ) {
$serverUrl = $wgCanonicalServer;
} elseif ( $defaultProto === PROTO_INTERNAL && $wgInternalServer !== false ) {
// Make $wgInternalServer fall back to $wgServer if not set
$serverUrl = $wgInternalServer;
} else {
$serverUrl = $wgServer;
if ( $defaultProto === PROTO_CURRENT ) {
$defaultProto = $wgRequest->getProtocol() . '://';
}
}
// Analyze $serverUrl to obtain its protocol
$bits = wfParseUrl( $serverUrl );
$serverHasProto = $bits && $bits['scheme'] != '';
if ( $defaultProto === PROTO_CANONICAL || $defaultProto === PROTO_INTERNAL ) {
if ( $serverHasProto ) {
$defaultProto = $bits['scheme'] . '://';
} else {
// $wgCanonicalServer or $wgInternalServer doesn't have a protocol.
// This really isn't supposed to happen. Fall back to HTTP in this
// ridiculous case.
$defaultProto = PROTO_HTTP;
}
}
$defaultProtoWithoutSlashes = substr( $defaultProto, 0, -2 );
if ( substr( $url, 0, 2 ) == '//' ) {
$url = $defaultProtoWithoutSlashes . $url;
} elseif ( substr( $url, 0, 1 ) == '/' ) {
// If $serverUrl is protocol-relative, prepend $defaultProtoWithoutSlashes,
// otherwise leave it alone.
if ( $serverHasProto ) {
$url = $serverUrl . $url;
} else {
// If an HTTPS URL is synthesized from a protocol-relative $wgServer, allow the
// user to override the port number (T67184)
if ( $defaultProto === PROTO_HTTPS && $wgHttpsPort != 443 ) {
if ( isset( $bits['port'] ) ) {
throw new Exception( 'A protocol-relative $wgServer may not contain a port number' );
}
$url = $defaultProtoWithoutSlashes . $serverUrl . ':' . $wgHttpsPort . $url;
} else {
$url = $defaultProtoWithoutSlashes . $serverUrl . $url;
}
}
}
$bits = wfParseUrl( $url );
if ( $bits && isset( $bits['path'] ) ) {
$bits['path'] = wfRemoveDotSegments( $bits['path'] );
return wfAssembleUrl( $bits );
} elseif ( $bits ) {
# No path to expand
return $url;
} elseif ( substr( $url, 0, 1 ) != '/' ) {
# URL is a relative path
return wfRemoveDotSegments( $url );
}
# Expanded URL is not valid.
return false;
}
/**
* Get the wiki's "server", i.e. the protocol and host part of the URL, with a
* protocol specified using a PROTO_* constant as in wfExpandUrl()
*
* @since 1.32
* @param string|int|null $proto One of the PROTO_* constants.
* @return string The URL
*/
function wfGetServerUrl( $proto ) {
$url = wfExpandUrl( '/', $proto );
return substr( $url, 0, -1 );
}
/**
* This function will reassemble a URL parsed with wfParseURL. This is useful
* if you need to edit part of a URL and put it back together.
*
* This is the basic structure used (brackets contain keys for $urlParts):
* [scheme][delimiter][user]:[pass]@[host]:[port][path]?[query]#[fragment]
*
* @todo Need to integrate this into wfExpandUrl (see T34168)
*
* @since 1.19
* @param array $urlParts URL parts, as output from wfParseUrl
* @return string URL assembled from its component parts
*/
function wfAssembleUrl( $urlParts ) {
$result = '';
if ( isset( $urlParts['delimiter'] ) ) {
if ( isset( $urlParts['scheme'] ) ) {
$result .= $urlParts['scheme'];
}
$result .= $urlParts['delimiter'];
}
if ( isset( $urlParts['host'] ) ) {
if ( isset( $urlParts['user'] ) ) {
$result .= $urlParts['user'];
if ( isset( $urlParts['pass'] ) ) {
$result .= ':' . $urlParts['pass'];
}
$result .= '@';
}
$result .= $urlParts['host'];
if ( isset( $urlParts['port'] ) ) {
$result .= ':' . $urlParts['port'];
}
}
if ( isset( $urlParts['path'] ) ) {
$result .= $urlParts['path'];
}
if ( isset( $urlParts['query'] ) ) {
$result .= '?' . $urlParts['query'];
}
if ( isset( $urlParts['fragment'] ) ) {
$result .= '#' . $urlParts['fragment'];
}
return $result;
}
/**
* Remove all dot-segments in the provided URL path. For example,
* '/a/./b/../c/' becomes '/a/c/'. For details on the algorithm, please see
* RFC3986 section 5.2.4.
*
* @todo Need to integrate this into wfExpandUrl (see T34168)
*
* @since 1.19
*
* @param string $urlPath URL path, potentially containing dot-segments
* @return string URL path with all dot-segments removed
*/
function wfRemoveDotSegments( $urlPath ) {
$output = '';
$inputOffset = 0;
$inputLength = strlen( $urlPath );
while ( $inputOffset < $inputLength ) {
$prefixLengthOne = substr( $urlPath, $inputOffset, 1 );
$prefixLengthTwo = substr( $urlPath, $inputOffset, 2 );
$prefixLengthThree = substr( $urlPath, $inputOffset, 3 );
$prefixLengthFour = substr( $urlPath, $inputOffset, 4 );
$trimOutput = false;
if ( $prefixLengthTwo == './' ) {
# Step A, remove leading "./"
$inputOffset += 2;
} elseif ( $prefixLengthThree == '../' ) {
# Step A, remove leading "../"
$inputOffset += 3;
} elseif ( ( $prefixLengthTwo == '/.' ) && ( $inputOffset + 2 == $inputLength ) ) {
# Step B, replace leading "/.$" with "/"
$inputOffset += 1;
$urlPath[$inputOffset] = '/';
} elseif ( $prefixLengthThree == '/./' ) {
# Step B, replace leading "/./" with "/"
$inputOffset += 2;
} elseif ( $prefixLengthThree == '/..' && ( $inputOffset + 3 == $inputLength ) ) {
# Step C, replace leading "/..$" with "/" and
# remove last path component in output
$inputOffset += 2;
$urlPath[$inputOffset] = '/';
$trimOutput = true;
} elseif ( $prefixLengthFour == '/../' ) {
# Step C, replace leading "/../" with "/" and
# remove last path component in output
$inputOffset += 3;
$trimOutput = true;
} elseif ( ( $prefixLengthOne == '.' ) && ( $inputOffset + 1 == $inputLength ) ) {
# Step D, remove "^.$"
$inputOffset += 1;
} elseif ( ( $prefixLengthTwo == '..' ) && ( $inputOffset + 2 == $inputLength ) ) {
# Step D, remove "^..$"
$inputOffset += 2;
} else {
# Step E, move leading path segment to output
if ( $prefixLengthOne == '/' ) {
$slashPos = strpos( $urlPath, '/', $inputOffset + 1 );
} else {
$slashPos = strpos( $urlPath, '/', $inputOffset );
}
if ( $slashPos === false ) {
$output .= substr( $urlPath, $inputOffset );
$inputOffset = $inputLength;
} else {
$output .= substr( $urlPath, $inputOffset, $slashPos - $inputOffset );
$inputOffset += $slashPos - $inputOffset;
}
}
if ( $trimOutput ) {
$slashPos = strrpos( $output, '/' );
if ( $slashPos === false ) {
$output = '';
} else {
$output = substr( $output, 0, $slashPos );
}
}
}
return $output;
}
/**
* Returns a regular expression of url protocols
*
* @param bool $includeProtocolRelative If false, remove '//' from the returned protocol list.
* DO NOT USE this directly, use wfUrlProtocolsWithoutProtRel() instead
* @return string
*/
function wfUrlProtocols( $includeProtocolRelative = true ) {
global $wgUrlProtocols;
// Cache return values separately based on $includeProtocolRelative
static $withProtRel = null, $withoutProtRel = null;
$cachedValue = $includeProtocolRelative ? $withProtRel : $withoutProtRel;
if ( !is_null( $cachedValue ) ) {
return $cachedValue;
}
// Support old-style $wgUrlProtocols strings, for backwards compatibility
// with LocalSettings files from 1.5
if ( is_array( $wgUrlProtocols ) ) {
$protocols = [];
foreach ( $wgUrlProtocols as $protocol ) {
// Filter out '//' if !$includeProtocolRelative
if ( $includeProtocolRelative || $protocol !== '//' ) {
$protocols[] = preg_quote( $protocol, '/' );
}
}
$retval = implode( '|', $protocols );
} else {
// Ignore $includeProtocolRelative in this case
// This case exists for pre-1.6 compatibility, and we can safely assume
// that '//' won't appear in a pre-1.6 config because protocol-relative
// URLs weren't supported until 1.18
$retval = $wgUrlProtocols;
}
// Cache return value
if ( $includeProtocolRelative ) {
$withProtRel = $retval;
} else {
$withoutProtRel = $retval;
}
return $retval;
}
/**
* Like wfUrlProtocols(), but excludes '//' from the protocol list. Use this if
* you need a regex that matches all URL protocols but does not match protocol-
* relative URLs
* @return string
*/
function wfUrlProtocolsWithoutProtRel() {
return wfUrlProtocols( false );
}
/**
* parse_url() work-alike, but non-broken. Differences:
*
* 1) Does not raise warnings on bad URLs (just returns false).
* 2) Handles protocols that don't use :// (e.g., mailto: and news:, as well as
* protocol-relative URLs) correctly.
* 3) Adds a "delimiter" element to the array (see (2)).
* 4) Verifies that the protocol is on the $wgUrlProtocols whitelist.
* 5) Rejects some invalid URLs that parse_url doesn't, e.g. the empty string or URLs starting with
* a line feed character.
*
* @param string $url A URL to parse
* @return string[]|bool Bits of the URL in an associative array, or false on failure.
* Possible fields:
* - scheme: URI scheme (protocol), e.g. 'http', 'mailto'. Lowercase, always present, but can
* be an empty string for protocol-relative URLs.
* - delimiter: either '://', ':' or '//'. Always present.
* - host: domain name / IP. Always present, but could be an empty string, e.g. for file: URLs.
* - user: user name, e.g. for HTTP Basic auth URLs such as http://user:pass@example.com/
* Missing when there is no username.
* - pass: password, same as above.
* - path: path including the leading /. Will be missing when empty (e.g. 'http://example.com')
* - query: query string (as a string; see wfCgiToArray() for parsing it), can be missing.
* - fragment: the part after #, can be missing.
*/
function wfParseUrl( $url ) {
global $wgUrlProtocols; // Allow all protocols defined in DefaultSettings/LocalSettings.php
// Protocol-relative URLs are handled really badly by parse_url(). It's so
// bad that the easiest way to handle them is to just prepend 'http:' and
// strip the protocol out later.
$wasRelative = substr( $url, 0, 2 ) == '//';
if ( $wasRelative ) {
$url = "http:$url";
}
AtEase::suppressWarnings();
$bits = parse_url( $url );
AtEase::restoreWarnings();
// parse_url() returns an array without scheme for some invalid URLs, e.g.
// parse_url("%0Ahttp://example.com") == [ 'host' => '%0Ahttp', 'path' => 'example.com' ]
if ( !$bits || !isset( $bits['scheme'] ) ) {
return false;
}
// parse_url() incorrectly handles schemes case-sensitively. Convert it to lowercase.
$bits['scheme'] = strtolower( $bits['scheme'] );
// most of the protocols are followed by ://, but mailto: and sometimes news: not, check for it
if ( in_array( $bits['scheme'] . '://', $wgUrlProtocols ) ) {
$bits['delimiter'] = '://';
} elseif ( in_array( $bits['scheme'] . ':', $wgUrlProtocols ) ) {
$bits['delimiter'] = ':';
// parse_url detects for news: and mailto: the host part of an url as path
// We have to correct this wrong detection
if ( isset( $bits['path'] ) ) {
$bits['host'] = $bits['path'];
$bits['path'] = '';
}
} else {
return false;
}
/* Provide an empty host for eg. file:/// urls (see T30627) */
if ( !isset( $bits['host'] ) ) {
$bits['host'] = '';
// See T47069
if ( isset( $bits['path'] ) ) {
/* parse_url loses the third / for file:///c:/ urls (but not on variants) */
if ( substr( $bits['path'], 0, 1 ) !== '/' ) {
$bits['path'] = '/' . $bits['path'];
}
} else {
$bits['path'] = '';
}
}
// If the URL was protocol-relative, fix scheme and delimiter
if ( $wasRelative ) {
$bits['scheme'] = '';
$bits['delimiter'] = '//';
}
return $bits;
}
/**
* Take a URL, make sure it's expanded to fully qualified, and replace any
* encoded non-ASCII Unicode characters with their UTF-8 original forms
* for more compact display and legibility for local audiences.
*
* @todo handle punycode domains too
*
* @param string $url
* @return string
*/
function wfExpandIRI( $url ) {
return preg_replace_callback(
'/((?:%[89A-F][0-9A-F])+)/i',
function ( array $matches ) {
return urldecode( $matches[1] );
},
wfExpandUrl( $url )
);
}
/**
* Check whether a given URL has a domain that occurs in a given set of domains
* @param string $url
* @param array $domains Array of domains (strings)
* @return bool True if the host part of $url ends in one of the strings in $domains
*/
function wfMatchesDomainList( $url, $domains ) {
$bits = wfParseUrl( $url );
if ( is_array( $bits ) && isset( $bits['host'] ) ) {
$host = '.' . $bits['host'];
foreach ( (array)$domains as $domain ) {
$domain = '.' . $domain;
if ( substr( $host, -strlen( $domain ) ) === $domain ) {
return true;
}
}
}
return false;
}
/**
* Sends a line to the debug log if enabled or, optionally, to a comment in output.
* In normal operation this is a NOP.
*
* Controlling globals:
* $wgDebugLogFile - points to the log file
* $wgDebugRawPage - if false, 'action=raw' hits will not result in debug output.
* $wgDebugComments - if on, some debug items may appear in comments in the HTML output.
*
* @since 1.25 support for additional context data
*
* @param string $text
* @param string|bool $dest Destination of the message:
* - 'all': both to the log and HTML (debug toolbar or HTML comments)
* - 'private': excluded from HTML output
* For backward compatibility, it can also take a boolean:
* - true: same as 'all'
* - false: same as 'private'
* @param array $context Additional logging context data
*/
function wfDebug( $text, $dest = 'all', array $context = [] ) {
global $wgDebugRawPage, $wgDebugLogPrefix;
global $wgDebugTimestamps;
if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
return;
}
$text = trim( $text );
if ( $wgDebugTimestamps ) {
$context['seconds_elapsed'] = sprintf(
'%6.4f',
microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT']
);
$context['memory_used'] = sprintf(
'%5.1fM',
( memory_get_usage( true ) / ( 1024 * 1024 ) )
);
}
if ( $wgDebugLogPrefix !== '' ) {
$context['prefix'] = $wgDebugLogPrefix;
}
$context['private'] = ( $dest === false || $dest === 'private' );
$logger = LoggerFactory::getInstance( 'wfDebug' );
$logger->debug( $text, $context );
}
/**
* Returns true if debug logging should be suppressed if $wgDebugRawPage = false
* @return bool
*/
function wfIsDebugRawPage() {
static $cache;
if ( $cache !== null ) {
return $cache;
}
// Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
// phpcs:ignore MediaWiki.Usage.SuperGlobalsUsage.SuperGlobals
if ( ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' )
|| (
isset( $_SERVER['SCRIPT_NAME'] )
&& substr( $_SERVER['SCRIPT_NAME'], -8 ) == 'load.php'
)
) {
$cache = true;
} else {
$cache = false;
}
return $cache;
}
/**
* Send a line giving PHP memory usage.
*
* @param bool $exact Print exact byte values instead of kibibytes (default: false)
*/
function wfDebugMem( $exact = false ) {
$mem = memory_get_usage();
if ( !$exact ) {
$mem = floor( $mem / 1024 ) . ' KiB';
} else {
$mem .= ' B';
}
wfDebug( "Memory usage: $mem\n" );
}
/**
* Send a line to a supplementary debug log file, if configured, or main debug
* log if not.
*
* To configure a supplementary log file, set $wgDebugLogGroups[$logGroup] to
* a string filename or an associative array mapping 'destination' to the
* desired filename. The associative array may also contain a 'sample' key
* with an integer value, specifying a sampling factor. Sampled log events
* will be emitted with a 1 in N random chance.
*
* @since 1.23 support for sampling log messages via $wgDebugLogGroups.
* @since 1.25 support for additional context data
* @since 1.25 sample behavior dependent on configured $wgMWLoggerDefaultSpi
*
* @param string $logGroup
* @param string $text
* @param string|bool $dest Destination of the message:
* - 'all': both to the log and HTML (debug toolbar or HTML comments)
* - 'private': only to the specific log if set in $wgDebugLogGroups and
* discarded otherwise
* For backward compatibility, it can also take a boolean:
* - true: same as 'all'
* - false: same as 'private'
* @param array $context Additional logging context data
*/
function wfDebugLog(
$logGroup, $text, $dest = 'all', array $context = []
) {
$text = trim( $text );
$logger = LoggerFactory::getInstance( $logGroup );
$context['private'] = ( $dest === false || $dest === 'private' );
$logger->info( $text, $context );
}
/**
* Log for database errors
*
* @since 1.25 support for additional context data
*
* @param string $text Database error message.
* @param array $context Additional logging context data
*/
function wfLogDBError( $text, array $context = [] ) {
$logger = LoggerFactory::getInstance( 'wfLogDBError' );
$logger->error( trim( $text ), $context );
}
/**
* Throws a warning that $function is deprecated
*
* @param string $function Function that is deprecated.
* @param string|bool $version Version of MediaWiki that the function
* was deprecated in (Added in 1.19).
* @param string|bool $component Component to which the function belongs.
* If false, it is assumed the function is in MediaWiki core (Added in 1.19).
* @param int $callerOffset How far up the call stack is the original
* caller. 2 = function that called the function that called
* wfDeprecated (Added in 1.20).
*
* @throws Exception If the MediaWiki version number is not a string or boolean.
*/
function wfDeprecated( $function, $version = false, $component = false, $callerOffset = 2 ) {
if ( is_string( $version ) || is_bool( $version ) ) {
MWDebug::deprecated( $function, $version, $component, $callerOffset + 1 );
} else {
throw new Exception(
"MediaWiki version must either be a string or a boolean. " .
"Example valid version: '1.33'"
);
}
}
/**
* Send a warning either to the debug log or in a PHP error depending on
* $wgDevelopmentWarnings. To log warnings in production, use wfLogWarning() instead.
*
* @param string $msg Message to send
* @param int $callerOffset Number of items to go back in the backtrace to
* find the correct caller (1 = function calling wfWarn, ...)
* @param int $level PHP error level; defaults to E_USER_NOTICE;
* only used when $wgDevelopmentWarnings is true
*/
function wfWarn( $msg, $callerOffset = 1, $level = E_USER_NOTICE ) {
MWDebug::warning( $msg, $callerOffset + 1, $level, 'auto' );
}
/**
* Send a warning as a PHP error and the debug log. This is intended for logging
* warnings in production. For logging development warnings, use WfWarn instead.
*
* @param string $msg Message to send
* @param int $callerOffset Number of items to go back in the backtrace to
* find the correct caller (1 = function calling wfLogWarning, ...)
* @param int $level PHP error level; defaults to E_USER_WARNING
*/
function wfLogWarning( $msg, $callerOffset = 1, $level = E_USER_WARNING ) {
MWDebug::warning( $msg, $callerOffset + 1, $level, 'production' );
}
/**
* @todo document
* @todo Move logic to MediaWiki.php
*/
function wfLogProfilingData() {
global $wgDebugLogGroups, $wgDebugRawPage;
$context = RequestContext::getMain();
$request = $context->getRequest();
$profiler = Profiler::instance();
$profiler->setContext( $context );
$profiler->logData();
// Send out any buffered statsd metrics as needed
MediaWiki::emitBufferedStatsdData(
MediaWikiServices::getInstance()->getStatsdDataFactory(),
$context->getConfig()
);
// Profiling must actually be enabled...
if ( $profiler instanceof ProfilerStub ) {
return;
}
if ( isset( $wgDebugLogGroups['profileoutput'] )
&& $wgDebugLogGroups['profileoutput'] === false
) {
// Explicitly disabled
return;
}
if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
return;
}
$ctx = [ 'elapsed' => $request->getElapsedTime() ];
if ( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
$ctx['forwarded_for'] = $_SERVER['HTTP_X_FORWARDED_FOR'];
}
if ( !empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
$ctx['client_ip'] = $_SERVER['HTTP_CLIENT_IP'];
}
if ( !empty( $_SERVER['HTTP_FROM'] ) ) {
$ctx['from'] = $_SERVER['HTTP_FROM'];
}
if ( isset( $ctx['forwarded_for'] ) ||
isset( $ctx['client_ip'] ) ||
isset( $ctx['from'] ) ) {
// @phan-suppress-next-line PhanTypeArraySuspiciousNullable
$ctx['proxy'] = $_SERVER['REMOTE_ADDR'];
}
// Don't load $wgUser at this late stage just for statistics purposes
// @todo FIXME: We can detect some anons even if it is not loaded.
// See User::getId()
$user = $context->getUser();
$ctx['anon'] = $user->isItemLoaded( 'id' ) && $user->isAnon();
// Command line script uses a FauxRequest object which does not have
// any knowledge about an URL and throw an exception instead.
try {
$ctx['url'] = urldecode( $request->getRequestURL() );
} catch ( Exception $ignored ) {
// no-op
}
$ctx['output'] = $profiler->getOutput();
$log = LoggerFactory::getInstance( 'profileoutput' );
$log->info( "Elapsed: {elapsed}; URL: <{url}>\n{output}", $ctx );
}
/**
* Increment a statistics counter
*
* @param string $key
* @param int $count
* @return void
*/
function wfIncrStats( $key, $count = 1 ) {
$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
$stats->updateCount( $key, $count );
}
/**
* Check whether the wiki is in read-only mode.
*
* @return bool
*/
function wfReadOnly() {
return MediaWikiServices::getInstance()->getReadOnlyMode()
->isReadOnly();
}
/**
* Check if the site is in read-only mode and return the message if so
*
* This checks wfConfiguredReadOnlyReason() and the main load balancer
* for replica DB lag. This may result in DB connection being made.
*
* @return string|bool String when in read-only mode; false otherwise
*/
function wfReadOnlyReason() {
return MediaWikiServices::getInstance()->getReadOnlyMode()
->getReason();
}
/**
* Get the value of $wgReadOnly or the contents of $wgReadOnlyFile.
*
* @return string|bool String when in read-only mode; false otherwise
* @since 1.27
*/
function wfConfiguredReadOnlyReason() {
return MediaWikiServices::getInstance()->getConfiguredReadOnlyMode()
->getReason();
}
/**
* Return a Language object from $langcode
*
* @param Language|string|bool $langcode Either:
* - a Language object
* - code of the language to get the message for, if it is
* a valid code create a language for that language, if
* it is a string but not a valid code then make a basic
* language object
* - a boolean: if it's false then use the global object for
* the current user's language (as a fallback for the old parameter
* functionality), or if it is true then use global object
* for the wiki's content language.
* @return Language
*/
function wfGetLangObj( $langcode = false ) {
# Identify which language to get or create a language object for.
# Using is_object here due to Stub objects.
if ( is_object( $langcode ) ) {
# Great, we already have the object (hopefully)!
return $langcode;
}
global $wgLanguageCode;
if ( $langcode === true || $langcode === $wgLanguageCode ) {
# $langcode is the language code of the wikis content language object.
# or it is a boolean and value is true
return MediaWikiServices::getInstance()->getContentLanguage();
}
global $wgLang;
if ( $langcode === false || $langcode === $wgLang->getCode() ) {
# $langcode is the language code of user language object.
# or it was a boolean and value is false
return $wgLang;
}
$validCodes = array_keys( Language::fetchLanguageNames() );
if ( in_array( $langcode, $validCodes ) ) {
# $langcode corresponds to a valid language.
return Language::factory( $langcode );
}
# $langcode is a string, but not a valid language code; use content language.
wfDebug( "Invalid language code passed to wfGetLangObj, falling back to content language.\n" );
return MediaWikiServices::getInstance()->getContentLanguage();
}
/**
* This is the function for getting translated interface messages.
*
* @see Message class for documentation how to use them.
* @see https://www.mediawiki.org/wiki/Manual:Messages_API
*
* This function replaces all old wfMsg* functions.
*
* @param string|string[]|MessageSpecifier $key Message key, or array of keys, or a MessageSpecifier
* @param string|string[] ...$params Normal message parameters
* @return Message
*
* @since 1.17
*
* @see Message::__construct
*/
function wfMessage( $key, ...$params ) {
$message = new Message( $key );
// We call Message::params() to reduce code duplication
if ( $params ) {
$message->params( ...$params );
}
return $message;
}
/**
* This function accepts multiple message keys and returns a message instance
* for the first message which is non-empty. If all messages are empty then an
* instance of the first message key is returned.
*
* @param string ...$keys Message keys
* @return Message
*
* @since 1.18
*
* @see Message::newFallbackSequence
*/
function wfMessageFallback( ...$keys ) {
return Message::newFallbackSequence( ...$keys );
}
/**
* Replace message parameter keys on the given formatted output.
*
* @param string $message
* @param array $args
* @return string
* @private
*/
function wfMsgReplaceArgs( $message, $args ) {
# Fix windows line-endings
# Some messages are split with explode("\n", $msg)
$message = str_replace( "\r", '', $message );
// Replace arguments
if ( is_array( $args ) && $args ) {
if ( is_array( $args[0] ) ) {
$args = array_values( $args[0] );
}
$replacementKeys = [];
foreach ( $args as $n => $param ) {
$replacementKeys['$' . ( $n + 1 )] = $param;
}
$message = strtr( $message, $replacementKeys );
}
return $message;
}
/**
* Fetch server name for use in error reporting etc.
* Use real server name if available, so we know which machine
* in a server farm generated the current page.
*
* @return string
*/
function wfHostname() {
static $host;
if ( is_null( $host ) ) {
# Hostname overriding
global $wgOverrideHostname;
if ( $wgOverrideHostname !== false ) {
# Set static and skip any detection
$host = $wgOverrideHostname;
return $host;
}
if ( function_exists( 'posix_uname' ) ) {
// This function not present on Windows
$uname = posix_uname();
} else {
$uname = false;
}
if ( is_array( $uname ) && isset( $uname['nodename'] ) ) {
$host = $uname['nodename'];
} elseif ( getenv( 'COMPUTERNAME' ) ) {
# Windows computer name
$host = getenv( 'COMPUTERNAME' );
} else {
# This may be a virtual server.
$host = $_SERVER['SERVER_NAME'];
}
}
return $host;
}
/**
* Returns a script tag that stores the amount of time it took MediaWiki to
* handle the request in milliseconds as 'wgBackendResponseTime'.
*
* If $wgShowHostnames is true, the script will also set 'wgHostname' to the
* hostname of the server handling the request.
*
* @param string|null $nonce Value from OutputPage::getCSPNonce
* @return string|WrappedString HTML
*/
function wfReportTime( $nonce = null ) {
global $wgShowHostnames;
$elapsed = ( microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT'] );
// seconds to milliseconds
$responseTime = round( $elapsed * 1000 );
$reportVars = [ 'wgBackendResponseTime' => $responseTime ];
if ( $wgShowHostnames ) {
$reportVars['wgHostname'] = wfHostname();
}
return Skin::makeVariablesScript( $reportVars, $nonce );
}
/**
* Safety wrapper for debug_backtrace().
*
* Will return an empty array if debug_backtrace is disabled, otherwise
* the output from debug_backtrace() (trimmed).
*
* @param int $limit This parameter can be used to limit the number of stack frames returned
*
* @return array Array of backtrace information
*/
function wfDebugBacktrace( $limit = 0 ) {
static $disabled = null;
if ( is_null( $disabled ) ) {
$disabled = !function_exists( 'debug_backtrace' );
if ( $disabled ) {
wfDebug( "debug_backtrace() is disabled\n" );
}
}
if ( $disabled ) {
return [];
}
if ( $limit ) {
return array_slice( debug_backtrace( DEBUG_BACKTRACE_PROVIDE_OBJECT, $limit + 1 ), 1 );
} else {
return array_slice( debug_backtrace(), 1 );
}
}
/**
* Get a debug backtrace as a string
*
* @param bool|null $raw If true, the return value is plain text. If false, HTML.
* Defaults to $wgCommandLineMode if unset.
* @return string
* @since 1.25 Supports $raw parameter.
*/
function wfBacktrace( $raw = null ) {
global $wgCommandLineMode;
if ( $raw === null ) {
$raw = $wgCommandLineMode;
}
if ( $raw ) {
$frameFormat = "%s line %s calls %s()\n";
$traceFormat = "%s";
} else {
$frameFormat = "%s line %s calls %s()\n";
$traceFormat = "\n";
}
$frames = array_map( function ( $frame ) use ( $frameFormat ) {
$file = !empty( $frame['file'] ) ? basename( $frame['file'] ) : '-';
$line = $frame['line'] ?? '-';
$call = $frame['function'];
if ( !empty( $frame['class'] ) ) {
$call = $frame['class'] . $frame['type'] . $call;
}
return sprintf( $frameFormat, $file, $line, $call );
}, wfDebugBacktrace() );
return sprintf( $traceFormat, implode( '', $frames ) );
}
/**
* Get the name of the function which called this function
* wfGetCaller( 1 ) is the function with the wfGetCaller() call (ie. __FUNCTION__)
* wfGetCaller( 2 ) [default] is the caller of the function running wfGetCaller()
* wfGetCaller( 3 ) is the parent of that.
*
* @param int $level
* @return string
*/
function wfGetCaller( $level = 2 ) {
$backtrace = wfDebugBacktrace( $level + 1 );
if ( isset( $backtrace[$level] ) ) {
return wfFormatStackFrame( $backtrace[$level] );
} else {
return 'unknown';
}
}
/**
* Return a string consisting of callers in the stack. Useful sometimes
* for profiling specific points.
*
* @param int $limit The maximum depth of the stack frame to return, or false for the entire stack.
* @return string
*/
function wfGetAllCallers( $limit = 3 ) {
$trace = array_reverse( wfDebugBacktrace() );
if ( !$limit || $limit > count( $trace ) - 1 ) {
$limit = count( $trace ) - 1;
}
$trace = array_slice( $trace, -$limit - 1, $limit );
return implode( '/', array_map( 'wfFormatStackFrame', $trace ) );
}
/**
* Return a string representation of frame
*
* @param array $frame
* @return string
*/
function wfFormatStackFrame( $frame ) {
if ( !isset( $frame['function'] ) ) {
return 'NO_FUNCTION_GIVEN';
}
return isset( $frame['class'] ) && isset( $frame['type'] ) ?
$frame['class'] . $frame['type'] . $frame['function'] :
$frame['function'];
}
/* Some generic result counters, pulled out of SearchEngine */
/**
* @todo document
*
* @param int $offset
* @param int $limit
* @return string
*/
function wfShowingResults( $offset, $limit ) {
return wfMessage( 'showingresults' )->numParams( $limit, $offset + 1 )->parse();
}
/**
* Whether the client accept gzip encoding
*
* Uses the Accept-Encoding header to check if the client supports gzip encoding.
* Use this when considering to send a gzip-encoded response to the client.
*
* @param bool $force Forces another check even if we already have a cached result.
* @return bool
*/
function wfClientAcceptsGzip( $force = false ) {
static $result = null;
if ( $result === null || $force ) {
$result = false;
if ( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
# @todo FIXME: We may want to blacklist some broken browsers
$m = [];
if ( preg_match(
'/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
$_SERVER['HTTP_ACCEPT_ENCODING'],
$m
)
) {
if ( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) {
$result = false;
return $result;
}
wfDebug( "wfClientAcceptsGzip: client accepts gzip.\n" );
$result = true;
}
}
}
return $result;
}
/**
* Escapes the given text so that it may be output using addWikiText()
* without any linking, formatting, etc. making its way through. This
* is achieved by substituting certain characters with HTML entities.
* As required by the callers, "" is not used.
*
* @param string $text Text to be escaped
* @param-taint $text escapes_html
* @return string
*/
function wfEscapeWikiText( $text ) {
global $wgEnableMagicLinks;
static $repl = null, $repl2 = null;
if ( $repl === null || defined( 'MW_PARSER_TEST' ) || defined( 'MW_PHPUNIT_TEST' ) ) {
// Tests depend upon being able to change $wgEnableMagicLinks, so don't cache
// in those situations
$repl = [
'"' => '"', '&' => '&', "'" => ''', '<' => '<',
'=' => '=', '>' => '>', '[' => '[', ']' => ']',
'{' => '{', '|' => '|', '}' => '}', ';' => ';',
"\n#" => "\n#", "\r#" => "\r#",
"\n*" => "\n*", "\r*" => "\r*",
"\n:" => "\n:", "\r:" => "\r:",
"\n " => "\n ", "\r " => "\r ",
"\n\n" => "\n
", "\r\n" => "
\n",
"\n\r" => "\n
", "\r\r" => "\r
",
"\n\t" => "\n ", "\r\t" => "\r ", // "\n\t\n" is treated like "\n\n"
"\n----" => "\n----", "\r----" => "\r----",
'__' => '__', '://' => '://',
];
$magicLinks = array_keys( array_filter( $wgEnableMagicLinks ) );
// We have to catch everything "\s" matches in PCRE
foreach ( $magicLinks as $magic ) {
$repl["$magic "] = "$magic ";
$repl["$magic\t"] = "$magic ";
$repl["$magic\r"] = "$magic
";
$repl["$magic\n"] = "$magic
";
$repl["$magic\f"] = "$magic";
}
// And handle protocols that don't use "://"
global $wgUrlProtocols;
$repl2 = [];
foreach ( $wgUrlProtocols as $prot ) {
if ( substr( $prot, -1 ) === ':' ) {
$repl2[] = preg_quote( substr( $prot, 0, -1 ), '/' );
}
}
$repl2 = $repl2 ? '/\b(' . implode( '|', $repl2 ) . '):/i' : '/^(?!)/';
}
$text = substr( strtr( "\n$text", $repl ), 1 );
$text = preg_replace( $repl2, '$1:', $text );
return $text;
}
/**
* Sets dest to source and returns the original value of dest
* If source is NULL, it just returns the value, it doesn't set the variable
* If force is true, it will set the value even if source is NULL
*
* @param mixed &$dest
* @param mixed $source
* @param bool $force
* @return mixed
*/
function wfSetVar( &$dest, $source, $force = false ) {
$temp = $dest;
if ( !is_null( $source ) || $force ) {
$dest = $source;
}
return $temp;
}
/**
* As for wfSetVar except setting a bit
*
* @param int &$dest
* @param int $bit
* @param bool $state
*
* @return bool
*/
function wfSetBit( &$dest, $bit, $state = true ) {
$temp = (bool)( $dest & $bit );
if ( !is_null( $state ) ) {
if ( $state ) {
$dest |= $bit;
} else {
$dest &= ~$bit;
}
}
return $temp;
}
/**
* A wrapper around the PHP function var_export().
* Either print it or add it to the regular output ($wgOut).
*
* @param mixed $var A PHP variable to dump.
*/
function wfVarDump( $var ) {
global $wgOut;
$s = str_replace( "\n", "
\n", var_export( $var, true ) . "\n" );
if ( headers_sent() || !isset( $wgOut ) || !is_object( $wgOut ) ) {
print $s;
} else {
$wgOut->addHTML( $s );
}
}
/**
* Provide a simple HTTP error.
*
* @param int|string $code
* @param string $label
* @param string $desc
*/
function wfHttpError( $code, $label, $desc ) {
global $wgOut;
HttpStatus::header( $code );
if ( $wgOut ) {
$wgOut->disable();
$wgOut->sendCacheControl();
}
MediaWiki\HeaderCallback::warnIfHeadersSent();
header( 'Content-type: text/html; charset=utf-8' );
print '' .
'' .
htmlspecialchars( $label ) .
'' .
htmlspecialchars( $label ) .
'
' .
nl2br( htmlspecialchars( $desc ) ) .
"
\n";
}
/**
* Clear away any user-level output buffers, discarding contents.
*
* Suitable for 'starting afresh', for instance when streaming
* relatively large amounts of data without buffering, or wanting to
* output image files without ob_gzhandler's compression.
*
* The optional $resetGzipEncoding parameter controls suppression of
* the Content-Encoding header sent by ob_gzhandler; by default it
* is left. See comments for wfClearOutputBuffers() for why it would
* be used.
*
* Note that some PHP configuration options may add output buffer
* layers which cannot be removed; these are left in place.
*
* @param bool $resetGzipEncoding
*/
function wfResetOutputBuffers( $resetGzipEncoding = true ) {
if ( $resetGzipEncoding ) {
// Suppress Content-Encoding and Content-Length
// headers from OutputHandler::handle.
global $wgDisableOutputCompression;
$wgDisableOutputCompression = true;
}
while ( $status = ob_get_status() ) {
if ( isset( $status['flags'] ) ) {
$flags = PHP_OUTPUT_HANDLER_CLEANABLE | PHP_OUTPUT_HANDLER_REMOVABLE;
$deleteable = ( $status['flags'] & $flags ) === $flags;
} elseif ( isset( $status['del'] ) ) {
$deleteable = $status['del'];
} else {
// Guess that any PHP-internal setting can't be removed.
$deleteable = $status['type'] !== 0; /* PHP_OUTPUT_HANDLER_INTERNAL */
}
if ( !$deleteable ) {
// Give up, and hope the result doesn't break
// output behavior.
break;
}
if ( $status['name'] === 'MediaWikiTestCase::wfResetOutputBuffersBarrier' ) {
// Unit testing barrier to prevent this function from breaking PHPUnit.
break;
}
if ( !ob_end_clean() ) {
// Could not remove output buffer handler; abort now
// to avoid getting in some kind of infinite loop.
break;
}
if ( $resetGzipEncoding && $status['name'] == 'ob_gzhandler' ) {
// Reset the 'Content-Encoding' field set by this handler
// so we can start fresh.
header_remove( 'Content-Encoding' );
break;
}
}
}
/**
* More legible than passing a 'false' parameter to wfResetOutputBuffers():
*
* Clear away output buffers, but keep the Content-Encoding header
* produced by ob_gzhandler, if any.
*
* This should be used for HTTP 304 responses, where you need to
* preserve the Content-Encoding header of the real result, but
* also need to suppress the output of ob_gzhandler to keep to spec
* and avoid breaking Firefox in rare cases where the headers and
* body are broken over two packets.
*/
function wfClearOutputBuffers() {
wfResetOutputBuffers( false );
}
/**
* Converts an Accept-* header into an array mapping string values to quality
* factors
*
* @param string $accept
* @param string $def Default
* @return float[] Associative array of string => float pairs
*/
function wfAcceptToPrefs( $accept, $def = '*/*' ) {
# No arg means accept anything (per HTTP spec)
if ( !$accept ) {
return [ $def => 1.0 ];
}
$prefs = [];
$parts = explode( ',', $accept );
foreach ( $parts as $part ) {
# @todo FIXME: Doesn't deal with params like 'text/html; level=1'
$values = explode( ';', trim( $part ) );
$match = [];
if ( count( $values ) == 1 ) {
$prefs[$values[0]] = 1.0;
} elseif ( preg_match( '/q\s*=\s*(\d*\.\d+)/', $values[1], $match ) ) {
$prefs[$values[0]] = floatval( $match[1] );
}
}
return $prefs;
}
/**
* Checks if a given MIME type matches any of the keys in the given
* array. Basic wildcards are accepted in the array keys.
*
* Returns the matching MIME type (or wildcard) if a match, otherwise
* NULL if no match.
*
* @param string $type
* @param array $avail
* @return string
* @private
*/
function mimeTypeMatch( $type, $avail ) {
if ( array_key_exists( $type, $avail ) ) {
return $type;
} else {
$mainType = explode( '/', $type )[0];
if ( array_key_exists( "$mainType/*", $avail ) ) {
return "$mainType/*";
} elseif ( array_key_exists( '*/*', $avail ) ) {
return '*/*';
} else {
return null;
}
}
}
/**
* Returns the 'best' match between a client's requested internet media types
* and the server's list of available types. Each list should be an associative
* array of type to preference (preference is a float between 0.0 and 1.0).
* Wildcards in the types are acceptable.
*
* @param array $cprefs Client's acceptable type list
* @param array $sprefs Server's offered types
* @return string|null
*
* @todo FIXME: Doesn't handle params like 'text/plain; charset=UTF-8'
* XXX: generalize to negotiate other stuff
* @todo The function appears unused. Is it worth to keep?
*/
function wfNegotiateType( $cprefs, $sprefs ) {
$combine = [];
foreach ( array_keys( $sprefs ) as $type ) {
$subType = explode( '/', $type )[1];
if ( $subType != '*' ) {
$ckey = mimeTypeMatch( $type, $cprefs );
if ( $ckey ) {
$combine[$type] = $sprefs[$type] * $cprefs[$ckey];
}
}
}
foreach ( array_keys( $cprefs ) as $type ) {
$subType = explode( '/', $type )[1];
if ( $subType != '*' && !array_key_exists( $type, $sprefs ) ) {
$skey = mimeTypeMatch( $type, $sprefs );
if ( $skey ) {
$combine[$type] = $sprefs[$skey] * $cprefs[$type];
}
}
}
$bestq = 0;
$besttype = null;
foreach ( array_keys( $combine ) as $type ) {
if ( $combine[$type] > $bestq ) {
$besttype = $type;
$bestq = $combine[$type];
}
}
return $besttype;
}
/**
* Get a timestamp string in one of various formats
*
* @param mixed $outputtype A timestamp in one of the supported formats, the
* function will autodetect which format is supplied and act accordingly.
* @param mixed $ts Optional timestamp to convert, default 0 for the current time
* @return string|bool String / false The same date in the format specified in $outputtype or false
*/
function wfTimestamp( $outputtype = TS_UNIX, $ts = 0 ) {
$ret = MWTimestamp::convert( $outputtype, $ts );
if ( $ret === false ) {
wfDebug( "wfTimestamp() fed bogus time value: TYPE=$outputtype; VALUE=$ts\n" );
}
return $ret;
}
/**
* Return a formatted timestamp, or null if input is null.
* For dealing with nullable timestamp columns in the database.
*
* @param int $outputtype
* @param string|null $ts
* @return string
*/
function wfTimestampOrNull( $outputtype = TS_UNIX, $ts = null ) {
if ( is_null( $ts ) ) {
return null;
} else {
return wfTimestamp( $outputtype, $ts );
}
}
/**
* Convenience function; returns MediaWiki timestamp for the present time.
*
* @return string TS_MW timestamp
*/
function wfTimestampNow() {
return MWTimestamp::now( TS_MW );
}
/**
* Check if the operating system is Windows
*
* @return bool True if it's Windows, false otherwise.
*/
function wfIsWindows() {
static $isWindows = null;
if ( $isWindows === null ) {
$isWindows = strtoupper( substr( PHP_OS, 0, 3 ) ) === 'WIN';
}
return $isWindows;
}
/**
* Check if we are running under HHVM
*
* @return bool
*/
function wfIsHHVM() {
return defined( 'HHVM_VERSION' );
}
/**
* Check if we are running from the commandline
*
* @since 1.31
* @return bool
*/
function wfIsCLI() {
return PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg';
}
/**
* Tries to get the system directory for temporary files. First
* $wgTmpDirectory is checked, and then the TMPDIR, TMP, and TEMP
* environment variables are then checked in sequence, then
* sys_get_temp_dir(), then upload_tmp_dir from php.ini.
*
* NOTE: When possible, use instead the tmpfile() function to create
* temporary files to avoid race conditions on file creation, etc.
*
* @return string
*/
function wfTempDir() {
global $wgTmpDirectory;
if ( $wgTmpDirectory !== false ) {
return $wgTmpDirectory;
}
return TempFSFile::getUsableTempDirectory();
}
/**
* Make directory, and make all parent directories if they don't exist
*
* @param string $dir Full path to directory to create
* @param int|null $mode Chmod value to use, default is $wgDirectoryMode
* @param string|null $caller Optional caller param for debugging.
* @throws MWException
* @return bool
*/
function wfMkdirParents( $dir, $mode = null, $caller = null ) {
global $wgDirectoryMode;
if ( FileBackend::isStoragePath( $dir ) ) { // sanity
throw new MWException( __FUNCTION__ . " given storage path '$dir'." );
}
if ( !is_null( $caller ) ) {
wfDebug( "$caller: called wfMkdirParents($dir)\n" );
}
if ( strval( $dir ) === '' || is_dir( $dir ) ) {
return true;
}
$dir = str_replace( [ '\\', '/' ], DIRECTORY_SEPARATOR, $dir );
if ( is_null( $mode ) ) {
$mode = $wgDirectoryMode;
}
// Turn off the normal warning, we're doing our own below
AtEase::suppressWarnings();
$ok = mkdir( $dir, $mode, true ); // PHP5 <3
AtEase::restoreWarnings();
if ( !$ok ) {
// directory may have been created on another request since we last checked
if ( is_dir( $dir ) ) {
return true;
}
// PHP doesn't report the path in its warning message, so add our own to aid in diagnosis.
wfLogWarning( sprintf( "failed to mkdir \"%s\" mode 0%o", $dir, $mode ) );
}
return $ok;
}
/**
* Remove a directory and all its content.
* Does not hide error.
* @param string $dir
*/
function wfRecursiveRemoveDir( $dir ) {
wfDebug( __FUNCTION__ . "( $dir )\n" );
// taken from https://www.php.net/manual/en/function.rmdir.php#98622
if ( is_dir( $dir ) ) {
$objects = scandir( $dir );
foreach ( $objects as $object ) {
if ( $object != "." && $object != ".." ) {
if ( filetype( $dir . '/' . $object ) == "dir" ) {
wfRecursiveRemoveDir( $dir . '/' . $object );
} else {
unlink( $dir . '/' . $object );
}
}
}
reset( $objects );
rmdir( $dir );
}
}
/**
* @param int $nr The number to format
* @param int $acc The number of digits after the decimal point, default 2
* @param bool $round Whether or not to round the value, default true
* @return string
*/
function wfPercent( $nr, $acc = 2, $round = true ) {
$ret = sprintf( "%.${acc}f", $nr );
return $round ? round( $ret, $acc ) . '%' : "$ret%";
}
/**
* Safety wrapper around ini_get() for boolean settings.
* The values returned from ini_get() are pre-normalized for settings
* set via php.ini or php_flag/php_admin_flag... but *not*
* for those set via php_value/php_admin_value.
*
* It's fairly common for people to use php_value instead of php_flag,
* which can leave you with an 'off' setting giving a false positive
* for code that just takes the ini_get() return value as a boolean.
*
* To make things extra interesting, setting via php_value accepts
* "true" and "yes" as true, but php.ini and php_flag consider them false. :)
* Unrecognized values go false... again opposite PHP's own coercion
* from string to bool.
*
* Luckily, 'properly' set settings will always come back as '0' or '1',
* so we only have to worry about them and the 'improper' settings.
*
* I frickin' hate PHP... :P
*
* @param string $setting
* @return bool
*/
function wfIniGetBool( $setting ) {
return wfStringToBool( ini_get( $setting ) );
}
/**
* Convert string value to boolean, when the following are interpreted as true:
* - on
* - true
* - yes
* - Any number, except 0
* All other strings are interpreted as false.
*
* @param string $val
* @return bool
* @since 1.31
*/
function wfStringToBool( $val ) {
$val = strtolower( $val );
// 'on' and 'true' can't have whitespace around them, but '1' can.
return $val == 'on'
|| $val == 'true'
|| $val == 'yes'
|| preg_match( "/^\s*[+-]?0*[1-9]/", $val ); // approx C atoi() function
}
/**
* Version of escapeshellarg() that works better on Windows.
*
* Originally, this fixed the incorrect use of single quotes on Windows
* (https://bugs.php.net/bug.php?id=26285) and the locale problems on Linux in
* PHP 5.2.6+ (bug backported to earlier distro releases of PHP).
*
* @param string|string[] ...$args strings to escape and glue together,
* or a single array of strings parameter
* @return string
* @deprecated since 1.30 use MediaWiki\Shell\Shell::escape()
*/
function wfEscapeShellArg( ...$args ) {
return Shell::escape( ...$args );
}
/**
* Execute a shell command, with time and memory limits mirrored from the PHP
* configuration if supported.
*
* @param string|string[] $cmd If string, a properly shell-escaped command line,
* or an array of unescaped arguments, in which case each value will be escaped
* Example: [ 'convert', '-font', 'font name' ] would produce "'convert' '-font' 'font name'"
* @param null|mixed &$retval Optional, will receive the program's exit code.
* (non-zero is usually failure). If there is an error from
* read, select, or proc_open(), this will be set to -1.
* @param array $environ Optional environment variables which should be
* added to the executed command environment.
* @param array $limits Optional array with limits(filesize, memory, time, walltime)
* this overwrites the global wgMaxShell* limits.
* @param array $options Array of options:
* - duplicateStderr: Set this to true to duplicate stderr to stdout,
* including errors from limit.sh
* - profileMethod: By default this function will profile based on the calling
* method. Set this to a string for an alternative method to profile from
* @phan-param array{duplicateStderr?:bool,profileMethod?:string} $options
*
* @return string Collected stdout as a string
* @deprecated since 1.30 use class MediaWiki\Shell\Shell
*/
function wfShellExec( $cmd, &$retval = null, $environ = [],
$limits = [], $options = []
) {
if ( Shell::isDisabled() ) {
$retval = 1;
// Backwards compatibility be upon us...
return 'Unable to run external programs, proc_open() is disabled.';
}
if ( is_array( $cmd ) ) {
$cmd = Shell::escape( $cmd );
}
$includeStderr = isset( $options['duplicateStderr'] ) && $options['duplicateStderr'];
$profileMethod = $options['profileMethod'] ?? wfGetCaller();
try {
$result = Shell::command( [] )
->unsafeParams( (array)$cmd )
->environment( $environ )
->limits( $limits )
->includeStderr( $includeStderr )
->profileMethod( $profileMethod )
// For b/c
->restrict( Shell::RESTRICT_NONE )
->execute();
} catch ( ProcOpenError $ex ) {
$retval = -1;
return '';
}
$retval = $result->getExitCode();
return $result->getStdout();
}
/**
* Execute a shell command, returning both stdout and stderr. Convenience
* function, as all the arguments to wfShellExec can become unwieldy.
*
* @note This also includes errors from limit.sh, e.g. if $wgMaxShellFileSize is exceeded.
* @param string|string[] $cmd If string, a properly shell-escaped command line,
* or an array of unescaped arguments, in which case each value will be escaped
* Example: [ 'convert', '-font', 'font name' ] would produce "'convert' '-font' 'font name'"
* @param null|mixed &$retval Optional, will receive the program's exit code.
* (non-zero is usually failure)
* @param array $environ Optional environment variables which should be
* added to the executed command environment.
* @param array $limits Optional array with limits(filesize, memory, time, walltime)
* this overwrites the global wgMaxShell* limits.
* @return string Collected stdout and stderr as a string
* @deprecated since 1.30 use class MediaWiki\Shell\Shell
*/
function wfShellExecWithStderr( $cmd, &$retval = null, $environ = [], $limits = [] ) {
return wfShellExec( $cmd, $retval, $environ, $limits,
[ 'duplicateStderr' => true, 'profileMethod' => wfGetCaller() ] );
}
/**
* Generate a shell-escaped command line string to run a MediaWiki cli script.
* Note that $parameters should be a flat array and an option with an argument
* should consist of two consecutive items in the array (do not use "--option value").
*
* @deprecated since 1.31, use Shell::makeScriptCommand()
*
* @param string $script MediaWiki cli script path
* @param array $parameters Arguments and options to the script
* @param array $options Associative array of options:
* 'php': The path to the php executable
* 'wrapper': Path to a PHP wrapper to handle the maintenance script
* @phan-param array{php?:string,wrapper?:string} $options
* @return string
*/
function wfShellWikiCmd( $script, array $parameters = [], array $options = [] ) {
global $wgPhpCli;
// Give site config file a chance to run the script in a wrapper.
// The caller may likely want to call wfBasename() on $script.
Hooks::run( 'wfShellWikiCmd', [ &$script, &$parameters, &$options ] );
$cmd = [ $options['php'] ?? $wgPhpCli ];
if ( isset( $options['wrapper'] ) ) {
$cmd[] = $options['wrapper'];
}
$cmd[] = $script;
// Escape each parameter for shell
return Shell::escape( array_merge( $cmd, $parameters ) );
}
/**
* wfMerge attempts to merge differences between three texts.
* Returns true for a clean merge and false for failure or a conflict.
*
* @param string $old
* @param string $mine
* @param string $yours
* @param string &$result
* @param string|null &$mergeAttemptResult
* @return bool
*/
function wfMerge( $old, $mine, $yours, &$result, &$mergeAttemptResult = null ) {
global $wgDiff3;
# This check may also protect against code injection in
# case of broken installations.
AtEase::suppressWarnings();
$haveDiff3 = $wgDiff3 && file_exists( $wgDiff3 );
AtEase::restoreWarnings();
if ( !$haveDiff3 ) {
wfDebug( "diff3 not found\n" );
return false;
}
# Make temporary files
$td = wfTempDir();
$oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
$mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
$yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
# NOTE: diff3 issues a warning to stderr if any of the files does not end with
# a newline character. To avoid this, we normalize the trailing whitespace before
# creating the diff.
fwrite( $oldtextFile, rtrim( $old ) . "\n" );
fclose( $oldtextFile );
fwrite( $mytextFile, rtrim( $mine ) . "\n" );
fclose( $mytextFile );
fwrite( $yourtextFile, rtrim( $yours ) . "\n" );
fclose( $yourtextFile );
# Check for a conflict
$cmd = Shell::escape( $wgDiff3, '-a', '--overlap-only', $mytextName,
$oldtextName, $yourtextName );
$handle = popen( $cmd, 'r' );
$mergeAttemptResult = '';
do {
$data = fread( $handle, 8192 );
if ( strlen( $data ) == 0 ) {
break;
}
$mergeAttemptResult .= $data;
} while ( true );
pclose( $handle );
$conflict = $mergeAttemptResult !== '';
# Merge differences
$cmd = Shell::escape( $wgDiff3, '-a', '-e', '--merge', $mytextName,
$oldtextName, $yourtextName );
$handle = popen( $cmd, 'r' );
$result = '';
do {
$data = fread( $handle, 8192 );
if ( strlen( $data ) == 0 ) {
break;
}
$result .= $data;
} while ( true );
pclose( $handle );
unlink( $mytextName );
unlink( $oldtextName );
unlink( $yourtextName );
if ( $result === '' && $old !== '' && !$conflict ) {
wfDebug( "Unexpected null result from diff3. Command: $cmd\n" );
$conflict = true;
}
return !$conflict;
}
/**
* Returns unified plain-text diff of two texts.
* "Useful" for machine processing of diffs.
*
* @deprecated since 1.25, use DiffEngine/UnifiedDiffFormatter directly
*
* @param string $before The text before the changes.
* @param string $after The text after the changes.
* @param string $params Command-line options for the diff command.
* @return string Unified diff of $before and $after
*/
function wfDiff( $before, $after, $params = '-u' ) {
if ( $before == $after ) {
return '';
}
global $wgDiff;
AtEase::suppressWarnings();
$haveDiff = $wgDiff && file_exists( $wgDiff );
AtEase::restoreWarnings();
# This check may also protect against code injection in
# case of broken installations.
if ( !$haveDiff ) {
wfDebug( "diff executable not found\n" );
$diffs = new Diff( explode( "\n", $before ), explode( "\n", $after ) );
$format = new UnifiedDiffFormatter();
return $format->format( $diffs );
}
# Make temporary files
$td = wfTempDir();
$oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
$newtextFile = fopen( $newtextName = tempnam( $td, 'merge-your-' ), 'w' );
fwrite( $oldtextFile, $before );
fclose( $oldtextFile );
fwrite( $newtextFile, $after );
fclose( $newtextFile );
// Get the diff of the two files
$cmd = "$wgDiff " . $params . ' ' . Shell::escape( $oldtextName, $newtextName );
$h = popen( $cmd, 'r' );
if ( !$h ) {
unlink( $oldtextName );
unlink( $newtextName );
throw new Exception( __METHOD__ . '(): popen() failed' );
}
$diff = '';
do {
$data = fread( $h, 8192 );
if ( strlen( $data ) == 0 ) {
break;
}
$diff .= $data;
} while ( true );
// Clean up
pclose( $h );
unlink( $oldtextName );
unlink( $newtextName );
// Kill the --- and +++ lines. They're not useful.
$diff_lines = explode( "\n", $diff );
if ( isset( $diff_lines[0] ) && strpos( $diff_lines[0], '---' ) === 0 ) {
unset( $diff_lines[0] );
}
if ( isset( $diff_lines[1] ) && strpos( $diff_lines[1], '+++' ) === 0 ) {
unset( $diff_lines[1] );
}
$diff = implode( "\n", $diff_lines );
return $diff;
}
/**
* Return the final portion of a pathname.
* Reimplemented because PHP5's "basename()" is buggy with multibyte text.
* https://bugs.php.net/bug.php?id=33898
*
* PHP's basename() only considers '\' a pathchar on Windows and Netware.
* We'll consider it so always, as we don't want '\s' in our Unix paths either.
*
* @param string $path
* @param string $suffix String to remove if present
* @return string
*/
function wfBaseName( $path, $suffix = '' ) {
if ( $suffix == '' ) {
$encSuffix = '';
} else {
$encSuffix = '(?:' . preg_quote( $suffix, '#' ) . ')?';
}
$matches = [];
if ( preg_match( "#([^/\\\\]*?){$encSuffix}[/\\\\]*$#", $path, $matches ) ) {
return $matches[1];
} else {
return '';
}
}
/**
* Generate a relative path name to the given file.
* May explode on non-matching case-insensitive paths,
* funky symlinks, etc.
*
* @param string $path Absolute destination path including target filename
* @param string $from Absolute source path, directory only
* @return string
*/
function wfRelativePath( $path, $from ) {
// Normalize mixed input on Windows...
$path = str_replace( '/', DIRECTORY_SEPARATOR, $path );
$from = str_replace( '/', DIRECTORY_SEPARATOR, $from );
// Trim trailing slashes -- fix for drive root
$path = rtrim( $path, DIRECTORY_SEPARATOR );
$from = rtrim( $from, DIRECTORY_SEPARATOR );
$pieces = explode( DIRECTORY_SEPARATOR, dirname( $path ) );
$against = explode( DIRECTORY_SEPARATOR, $from );
if ( $pieces[0] !== $against[0] ) {
// Non-matching Windows drive letters?
// Return a full path.
return $path;
}
// Trim off common prefix
while ( count( $pieces ) && count( $against )
&& $pieces[0] == $against[0] ) {
array_shift( $pieces );
array_shift( $against );
}
// relative dots to bump us to the parent
while ( count( $against ) ) {
array_unshift( $pieces, '..' );
array_shift( $against );
}
array_push( $pieces, wfBaseName( $path ) );
return implode( DIRECTORY_SEPARATOR, $pieces );
}
/**
* Initialise php session
*
* @deprecated since 1.27, use MediaWiki\Session\SessionManager instead.
* Generally, "using" SessionManager will be calling ->getSessionById() or
* ::getGlobalSession() (depending on whether you were passing $sessionId
* here), then calling $session->persist().
* @param bool|string $sessionId
*/
function wfSetupSession( $sessionId = false ) {
wfDeprecated( __FUNCTION__, '1.27' );
if ( $sessionId ) {
session_id( $sessionId );
}
$session = SessionManager::getGlobalSession();
$session->persist();
if ( session_id() !== $session->getId() ) {
session_id( $session->getId() );
}
AtEase::quietCall( 'session_start' );
}
/**
* Get an object from the precompiled serialized directory
*
* @param string $name
* @return mixed The variable on success, false on failure
*/
function wfGetPrecompiledData( $name ) {
global $IP;
$file = "$IP/serialized/$name";
if ( file_exists( $file ) ) {
$blob = file_get_contents( $file );
if ( $blob ) {
return unserialize( $blob );
}
}
return false;
}
/**
* Make a cache key for the local wiki.
*
* @deprecated since 1.30 Call makeKey on a BagOStuff instance
* @param string ...$args
* @return string
*/
function wfMemcKey( ...$args ) {
return ObjectCache::getLocalClusterInstance()->makeKey( ...$args );
}
/**
* Make a cache key for a foreign DB.
*
* Must match what wfMemcKey() would produce in context of the foreign wiki.
*
* @param string $db
* @param string $prefix
* @param string ...$args
* @return string
*/
function wfForeignMemcKey( $db, $prefix, ...$args ) {
$keyspace = $prefix ? "$db-$prefix" : $db;
return ObjectCache::getLocalClusterInstance()->makeKeyInternal( $keyspace, $args );
}
/**
* Make a cache key with database-agnostic prefix.
*
* Doesn't have a wiki-specific namespace. Uses a generic 'global' prefix
* instead. Must have a prefix as otherwise keys that use a database name
* in the first segment will clash with wfMemcKey/wfForeignMemcKey.
*
* @deprecated since 1.30 Call makeGlobalKey on a BagOStuff instance
* @since 1.26
* @param string ...$args
* @return string
*/
function wfGlobalCacheKey( ...$args ) {
wfDeprecated( __METHOD__, '1.30' );
return ObjectCache::getLocalClusterInstance()->makeGlobalKey( ...$args );
}
/**
* Get an ASCII string identifying this wiki
* This is used as a prefix in memcached keys
*
* @return string
*/
function wfWikiID() {
global $wgDBprefix, $wgDBname;
if ( $wgDBprefix ) {
return "$wgDBname-$wgDBprefix";
} else {
return $wgDBname;
}
}
/**
* Get a Database object.
*
* @param int $db Index of the connection to get. May be DB_MASTER for the
* master (for write queries), DB_REPLICA for potentially lagged read
* queries, or an integer >= 0 for a particular server.
*
* @param string|string[] $groups Query groups. An array of group names that this query
* belongs to. May contain a single string if the query is only
* in one group.
*
* @param string|bool $wiki The wiki ID, or false for the current wiki
*
* Note: multiple calls to wfGetDB(DB_REPLICA) during the course of one request
* will always return the same object, unless the underlying connection or load
* balancer is manually destroyed.
*
* Note 2: use $this->getDB() in maintenance scripts that may be invoked by
* updater to ensure that a proper database is being updated.
*
* @todo Replace calls to wfGetDB with calls to LoadBalancer::getConnection()
* on an injected instance of LoadBalancer.
*
* @return \Wikimedia\Rdbms\DBConnRef
*/
function wfGetDB( $db, $groups = [], $wiki = false ) {
return wfGetLB( $wiki )->getMaintenanceConnectionRef( $db, $groups, $wiki );
}
/**
* Get a load balancer object.
*
* @deprecated since 1.27, use MediaWikiServices::getInstance()->getDBLoadBalancer()
* or MediaWikiServices::getInstance()->getDBLoadBalancerFactory() instead.
*
* @param string|bool $wiki Wiki ID, or false for the current wiki
* @return \Wikimedia\Rdbms\LoadBalancer
*/
function wfGetLB( $wiki = false ) {
if ( $wiki === false ) {
return MediaWikiServices::getInstance()->getDBLoadBalancer();
} else {
$factory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
return $factory->getMainLB( $wiki );
}
}
/**
* Find a file.
* @deprecated since 1.34, use MediaWikiServices
* @param string|LinkTarget $title String or LinkTarget object
* @param array $options Associative array of options (see RepoGroup::findFile)
* @return File|bool File, or false if the file does not exist
*/
function wfFindFile( $title, $options = [] ) {
return MediaWikiServices::getInstance()->getRepoGroup()->findFile( $title, $options );
}
/**
* Get an object referring to a locally registered file.
* Returns a valid placeholder object if the file does not exist.
*
* @deprecated since 1.34, use MediaWikiServices
* @param Title|string $title
* @return LocalFile|null A File, or null if passed an invalid Title
*/
function wfLocalFile( $title ) {
return MediaWikiServices::getInstance()->getRepoGroup()->getLocalRepo()->newFile( $title );
}
/**
* Should low-performance queries be disabled?
*
* @return bool
* @codeCoverageIgnore
*/
function wfQueriesMustScale() {
global $wgMiserMode;
return $wgMiserMode
|| ( SiteStats::pages() > 100000
&& SiteStats::edits() > 1000000
&& SiteStats::users() > 10000 );
}
/**
* Get the path to a specified script file, respecting file
* extensions; this is a wrapper around $wgScriptPath etc.
* except for 'index' and 'load' which use $wgScript/$wgLoadScript
*
* @param string $script Script filename, sans extension
* @return string
*/
function wfScript( $script = 'index' ) {
global $wgScriptPath, $wgScript, $wgLoadScript;
if ( $script === 'index' ) {
return $wgScript;
} elseif ( $script === 'load' ) {
return $wgLoadScript;
} else {
return "{$wgScriptPath}/{$script}.php";
}
}
/**
* Get the script URL.
*
* @return string Script URL
*/
function wfGetScriptUrl() {
if ( isset( $_SERVER['SCRIPT_NAME'] ) ) {
/* as it was called, minus the query string.
*
* Some sites use Apache rewrite rules to handle subdomains,
* and have PHP set up in a weird way that causes PHP_SELF
* to contain the rewritten URL instead of the one that the
* outside world sees.
*
* If in this mode, use SCRIPT_URL instead, which mod_rewrite
* provides containing the "before" URL.
*/
return $_SERVER['SCRIPT_NAME'];
} else {
return $_SERVER['URL'];
}
}
/**
* Convenience function converts boolean values into "true"
* or "false" (string) values
*
* @param bool $value
* @return string
*/
function wfBoolToStr( $value ) {
return $value ? 'true' : 'false';
}
/**
* Get a platform-independent path to the null file, e.g. /dev/null
*
* @return string
*/
function wfGetNull() {
return wfIsWindows() ? 'NUL' : '/dev/null';
}
/**
* Waits for the replica DBs to catch up to the master position
*
* Use this when updating very large numbers of rows, as in maintenance scripts,
* to avoid causing too much lag. Of course, this is a no-op if there are no replica DBs.
*
* By default this waits on the main DB cluster of the current wiki.
* If $cluster is set to "*" it will wait on all DB clusters, including
* external ones. If the lag being waiting on is caused by the code that
* does this check, it makes since to use $ifWritesSince, particularly if
* cluster is "*", to avoid excess overhead.
*
* Never call this function after a big DB write that is still in a transaction.
* This only makes sense after the possible lag inducing changes were committed.
*
* @param float|null $ifWritesSince Only wait if writes were done since this UNIX timestamp
* @param string|bool $wiki Wiki identifier accepted by wfGetLB
* @param string|bool $cluster Cluster name accepted by LBFactory. Default: false.
* @param int|null $timeout Max wait time. Default: 60 seconds (cli), 1 second (web)
* @return bool Success (able to connect and no timeouts reached)
* @deprecated since 1.27 Use LBFactory::waitForReplication
*/
function wfWaitForSlaves(
$ifWritesSince = null, $wiki = false, $cluster = false, $timeout = null
) {
$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
if ( $cluster === '*' ) {
$cluster = false;
$domain = false;
} elseif ( $wiki === false ) {
$domain = $lbFactory->getLocalDomainID();
} else {
$domain = $wiki;
}
$opts = [
'domain' => $domain,
'cluster' => $cluster,
// B/C: first argument used to be "max seconds of lag"; ignore such values
'ifWritesSince' => ( $ifWritesSince > 1e9 ) ? $ifWritesSince : null
];
if ( $timeout !== null ) {
$opts['timeout'] = $timeout;
}
return $lbFactory->waitForReplication( $opts );
}
/**
* Replace all invalid characters with '-'.
* Additional characters can be defined in $wgIllegalFileChars (see T22489).
* By default, $wgIllegalFileChars includes ':', '/', '\'.
*
* @param string $name Filename to process
* @return string
*/
function wfStripIllegalFilenameChars( $name ) {
global $wgIllegalFileChars;
$illegalFileChars = $wgIllegalFileChars ? "|[" . $wgIllegalFileChars . "]" : '';
$name = preg_replace(
"/[^" . Title::legalChars() . "]" . $illegalFileChars . "/",
'-',
$name
);
// $wgIllegalFileChars may not include '/' and '\', so we still need to do this
$name = wfBaseName( $name );
return $name;
}
/**
* Raise PHP's memory limit (if needed).
*
* @internal For use by Setup.php
*/
function wfMemoryLimit( $newLimit ) {
$oldLimit = wfShorthandToInteger( ini_get( 'memory_limit' ) );
// If the INI config is already unlimited, there is nothing larger
if ( $oldLimit != -1 ) {
$newLimit = wfShorthandToInteger( $newLimit );
if ( $newLimit == -1 ) {
wfDebug( "Removing PHP's memory limit\n" );
Wikimedia\suppressWarnings();
ini_set( 'memory_limit', $newLimit );
Wikimedia\restoreWarnings();
} elseif ( $newLimit > $oldLimit ) {
wfDebug( "Raising PHP's memory limit to $newLimit bytes\n" );
Wikimedia\suppressWarnings();
ini_set( 'memory_limit', $newLimit );
Wikimedia\restoreWarnings();
}
}
}
/**
* Set PHP's time limit to the larger of php.ini or $wgTransactionalTimeLimit
*
* @return int Prior time limit
* @since 1.26
*/
function wfTransactionalTimeLimit() {
global $wgTransactionalTimeLimit;
$timeLimit = ini_get( 'max_execution_time' );
// Note that CLI scripts use 0
if ( $timeLimit > 0 && $wgTransactionalTimeLimit > $timeLimit ) {
set_time_limit( $wgTransactionalTimeLimit );
}
ignore_user_abort( true ); // ignore client disconnects
return $timeLimit;
}
/**
* Converts shorthand byte notation to integer form
*
* @param string $string
* @param int $default Returned if $string is empty
* @return int
*/
function wfShorthandToInteger( $string = '', $default = -1 ) {
$string = trim( $string );
if ( $string === '' ) {
return $default;
}
$last = $string[strlen( $string ) - 1];
$val = intval( $string );
switch ( $last ) {
case 'g':
case 'G':
$val *= 1024;
// break intentionally missing
case 'm':
case 'M':
$val *= 1024;
// break intentionally missing
case 'k':
case 'K':
$val *= 1024;
}
return $val;
}
/**
* Get a specific cache object.
*
* @deprecated since 1.32, use ObjectCache::getInstance() instead
* @param int|string $cacheType A CACHE_* constants, or other key in $wgObjectCaches
* @return BagOStuff
*/
function wfGetCache( $cacheType ) {
return ObjectCache::getInstance( $cacheType );
}
/**
* Get the main cache object
*
* @deprecated since 1.32, use ObjectCache::getLocalClusterInstance() instead
* @return BagOStuff
*/
function wfGetMainCache() {
return ObjectCache::getLocalClusterInstance();
}
/**
* Get the cache object used by the message cache
*
* @return BagOStuff
*/
function wfGetMessageCacheStorage() {
global $wgMessageCacheType;
return ObjectCache::getInstance( $wgMessageCacheType );
}
/**
* Wrapper around php's unpack.
*
* @param string $format The format string (See php's docs)
* @param string $data A binary string of binary data
* @param int|bool $length The minimum length of $data or false. This is to
* prevent reading beyond the end of $data. false to disable the check.
*
* Also be careful when using this function to read unsigned 32 bit integer
* because php might make it negative.
*
* @throws MWException If $data not long enough, or if unpack fails
* @return array Associative array of the extracted data
*/
function wfUnpack( $format, $data, $length = false ) {
if ( $length !== false ) {
$realLen = strlen( $data );
if ( $realLen < $length ) {
throw new MWException( "Tried to use wfUnpack on a "
. "string of length $realLen, but needed one "
. "of at least length $length."
);
}
}
Wikimedia\suppressWarnings();
$result = unpack( $format, $data );
Wikimedia\restoreWarnings();
if ( $result === false ) {
// If it cannot extract the packed data.
throw new MWException( "unpack could not unpack binary data" );
}
return $result;
}
/**
* Determine if an image exists on the 'bad image list'.
*
* The format of MediaWiki:Bad_image_list is as follows:
* * Only list items (lines starting with "*") are considered
* * The first link on a line must be a link to a bad image
* * Any subsequent links on the same line are considered to be exceptions,
* i.e. articles where the image may occur inline.
*
* @deprecated since 1.34, use the BadFileLookup service directly instead
*
* @param string $name The image name to check
* @param Title|bool $contextTitle The page on which the image occurs, if known
* @param string|null $blacklist Wikitext of a file blacklist
* @return bool
*/
function wfIsBadImage( $name, $contextTitle = false, $blacklist = null ) {
$services = MediaWikiServices::getInstance();
if ( $blacklist !== null ) {
wfDeprecated( __METHOD__ . ' with $blacklist parameter', '1.34' );
return ( new BadFileLookup(
function () use ( $blacklist ) {
return $blacklist;
},
$services->getLocalServerObjectCache(),
$services->getRepoGroup(),
$services->getTitleParser()
) )->isBadFile( $name, $contextTitle ?: null );
}
return $services->getBadFileLookup()->isBadFile( $name, $contextTitle ?: null );
}
/**
* Determine whether the client at a given source IP is likely to be able to
* access the wiki via HTTPS.
*
* @param string $ip The IPv4/6 address in the normal human-readable form
* @return bool
*/
function wfCanIPUseHTTPS( $ip ) {
$canDo = true;
Hooks::run( 'CanIPUseHTTPS', [ $ip, &$canDo ] );
return (bool)$canDo;
}
/**
* Determine input string is represents as infinity
*
* @param string $str The string to determine
* @return bool
* @since 1.25
*/
function wfIsInfinity( $str ) {
// These are hardcoded elsewhere in MediaWiki (e.g. mediawiki.special.block.js).
$infinityValues = [ 'infinite', 'indefinite', 'infinity', 'never' ];
return in_array( $str, $infinityValues );
}
/**
* Returns true if these thumbnail parameters match one that MediaWiki
* requests from file description pages and/or parser output.
*
* $params is considered non-standard if they involve a non-standard
* width or any non-default parameters aside from width and page number.
* The number of possible files with standard parameters is far less than
* that of all combinations; rate-limiting for them can thus be more generious.
*
* @param File $file
* @param array $params
* @return bool
* @since 1.24 Moved from thumb.php to GlobalFunctions in 1.25
*/
function wfThumbIsStandard( File $file, array $params ) {
global $wgThumbLimits, $wgImageLimits, $wgResponsiveImages;
$multipliers = [ 1 ];
if ( $wgResponsiveImages ) {
// These available sizes are hardcoded currently elsewhere in MediaWiki.
// @see Linker::processResponsiveImages
$multipliers[] = 1.5;
$multipliers[] = 2;
}
$handler = $file->getHandler();
if ( !$handler || !isset( $params['width'] ) ) {
return false;
}
$basicParams = [];
if ( isset( $params['page'] ) ) {
$basicParams['page'] = $params['page'];
}
$thumbLimits = [];
$imageLimits = [];
// Expand limits to account for multipliers
foreach ( $multipliers as $multiplier ) {
$thumbLimits = array_merge( $thumbLimits, array_map(
function ( $width ) use ( $multiplier ) {
return round( $width * $multiplier );
}, $wgThumbLimits )
);
$imageLimits = array_merge( $imageLimits, array_map(
function ( $pair ) use ( $multiplier ) {
return [
round( $pair[0] * $multiplier ),
round( $pair[1] * $multiplier ),
];
}, $wgImageLimits )
);
}
// Check if the width matches one of $wgThumbLimits
if ( in_array( $params['width'], $thumbLimits ) ) {
$normalParams = $basicParams + [ 'width' => $params['width'] ];
// Append any default values to the map (e.g. "lossy", "lossless", ...)
$handler->normaliseParams( $file, $normalParams );
} else {
// If not, then check if the width matchs one of $wgImageLimits
$match = false;
foreach ( $imageLimits as $pair ) {
$normalParams = $basicParams + [ 'width' => $pair[0], 'height' => $pair[1] ];
// Decide whether the thumbnail should be scaled on width or height.
// Also append any default values to the map (e.g. "lossy", "lossless", ...)
$handler->normaliseParams( $file, $normalParams );
// Check if this standard thumbnail size maps to the given width
if ( $normalParams['width'] == $params['width'] ) {
$match = true;
break;
}
}
if ( !$match ) {
return false; // not standard for description pages
}
}
// Check that the given values for non-page, non-width, params are just defaults
foreach ( $params as $key => $value ) {
if ( !isset( $normalParams[$key] ) || $normalParams[$key] != $value ) {
return false;
}
}
return true;
}
/**
* Merges two (possibly) 2 dimensional arrays into the target array ($baseArray).
*
* Values that exist in both values will be combined with += (all values of the array
* of $newValues will be added to the values of the array of $baseArray, while values,
* that exists in both, the value of $baseArray will be used).
*
* @param array $baseArray The array where you want to add the values of $newValues to
* @param array $newValues An array with new values
* @return array The combined array
* @since 1.26
*/
function wfArrayPlus2d( array $baseArray, array $newValues ) {
// First merge items that are in both arrays
foreach ( $baseArray as $name => &$groupVal ) {
if ( isset( $newValues[$name] ) ) {
$groupVal += $newValues[$name];
}
}
// Now add items that didn't exist yet
$baseArray += $newValues;
return $baseArray;
}
/**
* Get system resource usage of current request context.
* Invokes the getrusage(2) system call, requesting RUSAGE_SELF if on PHP5
* or RUSAGE_THREAD if on HHVM. Returns false if getrusage is not available.
*
* @since 1.24
* @return array|bool Resource usage data or false if no data available.
*/
function wfGetRusage() {
if ( !function_exists( 'getrusage' ) ) {
return false;
} elseif ( defined( 'HHVM_VERSION' ) && PHP_OS === 'Linux' ) {
return getrusage( 2 /* RUSAGE_THREAD */ );
} else {
return getrusage( 0 /* RUSAGE_SELF */ );
}
}