'mbstring',
'utf8_encode' => 'xml',
'ctype_digit' => 'ctype',
'json_decode' => 'json',
'iconv' => 'iconv',
);
/**
* @var string Which entry point we are protecting. One of:
* - index.php
* - load.php
* - api.php
* - mw-config/index.php
* - cli
*/
var $entryPoint = null;
/**
* @param string $entryPoint Which entry point we are protecting. One of:
* - index.php
* - load.php
* - api.php
* - mw-config/index.php
* - cli
* @return $this
*/
function setEntryPoint( $entryPoint ) {
$this->entryPoint = $entryPoint;
}
/**
* Returns the version of the installed php implementation.
*
* @return string
*/
function getPHPImplVersion() {
return PHP_VERSION;
}
/**
* Displays an error, if the installed php version does not meet the minimum requirement.
*
* @return $this
*/
function checkRequiredPHPVersion() {
if (
!function_exists( 'version_compare' )
|| version_compare( $this->getPHPImplVersion(), $this->minimumVersionPHP ) < 0
) {
$shortText = "MediaWiki $this->mwVersion requires at least PHP version"
. " $this->minimumVersionPHP, you are using PHP {$this->getPHPImplVersion()}.";
$longText = "Error: You might be using on older PHP version. \n"
. "MediaWiki $this->mwVersion needs PHP $this->minimumVersionPHP or higher.\n\n"
. "Check if you have a newer php executable with a different name, "
. "such as php5.\n\n";
$longHtml = <<upgrading your copy of PHP.
PHP versions less than 5.5.0 are no longer supported by the PHP Group and will not receive
security or bugfix updates.
If for some reason you are unable to upgrade your PHP version, you will need to
download an older version
of MediaWiki from our website. See our
compatibility page
for details of which versions are compatible with prior versions of PHP.
HTML;
$this->triggerError( 'Supported PHP versions', $shortText, $longText, $longHtml );
}
}
/**
* Displays an error, if the vendor/autoload.php file could not be found.
*
* @return $this
*/
function checkVendorExistence() {
if ( !file_exists( dirname( __FILE__ ) . '/../vendor/autoload.php' ) ) {
$shortText = "Installing some external dependencies (e.g. via composer) is required.";
$longText = "Error: You are missing some external dependencies. \n"
. "MediaWiki now also has some external dependencies that need to be installed\n"
. "via composer or from a separate git repo. Please see\n"
. "https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries\n"
. "for help on installing the required components.";
$longHtml = <<mediawiki.org
for help on installing the required components.
HTML;
$this->triggerError( 'External dependencies', $shortText, $longText, $longHtml );
}
}
/**
* Displays an error, if a PHP extension does not exist.
*
* @return $this
*/
function checkExtensionExistence() {
$missingExtensions = array();
foreach ( $this->functionsExtensionsMapping as $function => $extension ) {
if ( !function_exists( $function ) ) {
$missingExtensions[] = $extension;
}
}
if ( $missingExtensions ) {
$shortText = "Installing some PHP extensions is required.";
$missingExtText = '';
$missingExtHtml = '';
$baseUrl = 'https://secure.php.net';
foreach ( $missingExtensions as $ext ) {
$missingExtText .= " * $ext <$baseUrl/$ext>\n";
$missingExtHtml .= "
$ext "
. "(more information)";
}
$cliText = "Error: Missing one or more required components of PHP.\n"
. "You are missing a required extension to PHP that MediaWiki needs.\n"
. "Please install:\n" . $missingExtText;
$longHtml = <<
$missingExtHtml
HTML;
$this->triggerError( 'Required components', $shortText, $cliText, $longHtml );
}
}
/**
* Output headers that prevents error pages to be cached.
*/
function outputHTMLHeader() {
$protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';
header( "$protocol 500 MediaWiki configuration Error" );
// Don't cache error pages! They cause no end of trouble...
header( 'Cache-control: none' );
header( 'Pragma: no-cache' );
}
/**
* Returns an error page, which is suitable for output to the end user via a web browser.
*
* @param $title
* @param $longHtml
* @param $shortText
* @return string
*/
function getIndexErrorOutput( $title, $longHtml, $shortText ) {
$pathinfo = pathinfo( $_SERVER['SCRIPT_NAME'] );
if ( $this->entryPoint == 'mw-config/index.php' ) {
$dirname = dirname( $pathinfo['dirname'] );
} else {
$dirname = $pathinfo['dirname'];
}
$encLogo =
htmlspecialchars( str_replace( '//', '/', $dirname . '/' ) .
'resources/assets/mediawiki.png' );
$shortHtml = htmlspecialchars( $shortText );
header( 'Content-type: text/html; charset=UTF-8' );
$finalOutput = <<
MediaWiki {$this->mwVersion}
MediaWiki {$this->mwVersion} internal error
{$shortHtml}
{$title}
{$longHtml}
HTML;
return $finalOutput;
}
/**
* Display something vaguely comprehensible in the event of a totally unrecoverable error.
* Does not assume access to *anything*; no globals, no autoloader, no database, no localisation.
* Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
* no longer need to be).
*
* Calling this function kills execution immediately.
*
* @param string $title HTML code to be put within an tag
* @param string $shortText
* @param string $longText
* @param string $longHtml
*/
function triggerError( $title, $shortText, $longText, $longHtml ) {
switch ( $this->entryPoint ) {
case 'cli':
$finalOutput = $longText;
break;
case 'index.php':
case 'mw-config/index.php':
$this->outputHTMLHeader();
$finalOutput = $this->getIndexErrorOutput( $title, $longHtml, $shortText );
break;
case 'load.php':
$this->outputHTMLHeader();
$finalOutput = "/* $shortText */";
break;
default:
$this->outputHTMLHeader();
// Handle everything that's not index.php
$finalOutput = $shortText;
}
echo "$finalOutput\n";
die( 1 );
}
}
/**
* Check php version and that external dependencies are installed, and
* display an informative error if either condition is not satisfied.
*
* @note Since we can't rely on anything, the minimum PHP versions and MW current
* version are hardcoded here
*/
function wfEntryPointCheck( $entryPoint ) {
$phpVersionCheck = new PHPVersionCheck();
$phpVersionCheck->setEntryPoint( $entryPoint );
$phpVersionCheck->checkRequiredPHPVersion();
$phpVersionCheck->checkVendorExistence();
$phpVersionCheck->checkExtensionExistence();
}