3 * This does the initial set up for a web request.
5 * It does some security checks, loads autoloaders, constants, and
6 * global functions, starts the profiler, loads the configuration,
7 * and loads Setup.php, which loads extensions using the extension
8 * registration system and initializes the application's global state.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 * http://www.gnu.org/copyleft/gpl.html
28 if ( ini_get( 'mbstring.func_overload' ) ) {
29 die( 'MediaWiki does not support installations where mbstring.func_overload is non-zero.' );
32 # T17461: Make IE8 turn off content sniffing. Everybody else should ignore this
33 # We're adding it here so that it's *always* set, even for alternate entry
34 # points and when $wgOut gets disabled or overridden.
35 header( 'X-Content-Type-Options: nosniff' );
38 * @var float Request start time as fractional seconds since epoch
39 * @deprecated since 1.25; use $_SERVER['REQUEST_TIME_FLOAT'] or
40 * WebRequest::getElapsedTime() instead.
42 $wgRequestTime = $_SERVER['REQUEST_TIME_FLOAT'];
46 # Valid web server entry point, enable includes.
47 # Please don't move this line to includes/Defines.php. This line essentially
48 # defines a valid entry point. If you put it in includes/Defines.php, then
49 # any script that includes it becomes an entry point, thereby defeating
51 define( 'MEDIAWIKI', true );
53 # Full path to working directory.
54 # Makes it possible to for example to have effective exclude path in apc.
55 # __DIR__ breaks symlinked includes, but realpath() returns false
56 # if we don't have permissions on parent directories.
57 $IP = getenv( 'MW_INSTALL_PATH' );
58 if ( $IP === false ) {
59 $IP = realpath( '.' ) ?
: dirname( __DIR__
);
62 # Grab profiling functions
63 require_once "$IP/includes/profiler/ProfilerFunctions.php";
65 # Start the autoloader, so that extensions can derive classes from core files
66 require_once "$IP/includes/AutoLoader.php";
68 # Load up some global defines.
69 require_once "$IP/includes/Defines.php";
73 if ( file_exists( "$IP/StartProfiler.php" ) ) {
74 require "$IP/StartProfiler.php";
77 # Load default settings
78 require_once "$IP/includes/DefaultSettings.php";
80 # Load global functions
81 require_once "$IP/includes/GlobalFunctions.php";
83 # Load composer's autoloader if present
84 if ( is_readable( "$IP/vendor/autoload.php" ) ) {
85 require_once "$IP/vendor/autoload.php";
88 # Assert that composer dependencies were successfully loaded
89 # Purposely no leading \ due to it breaking HHVM RepoAuthorative mode
90 # PHP works fine with both versions
91 # See https://github.com/facebook/hhvm/issues/5833
92 if ( !interface_exists( 'Psr\Log\LoggerInterface' ) ) {
94 'MediaWiki requires the <a href="https://github.com/php-fig/log">PSR-3 logging ' .
95 "library</a> to be present. This library is not embedded directly in MediaWiki's " .
96 "git repository and must be installed separately by the end user.\n\n" .
97 'Please see <a href="https://www.mediawiki.org/wiki/Download_from_Git' .
98 '#Fetch_external_libraries">mediawiki.org</a> for help on installing ' .
99 'the required components.'
102 trigger_error( $message, E_USER_ERROR
);
106 # Install a header callback
107 MediaWiki\HeaderCallback
::register();
109 if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
110 # Use a callback function to configure MediaWiki
111 call_user_func( MW_CONFIG_CALLBACK
);
113 if ( !defined( 'MW_CONFIG_FILE' ) ) {
114 define( 'MW_CONFIG_FILE', "$IP/LocalSettings.php" );
117 # LocalSettings.php is the per site customization file. If it does not exist
118 # the wiki installer needs to be launched or the generated file uploaded to
119 # the root wiki directory. Give a hint, if it is not readable by the server.
120 if ( !is_readable( MW_CONFIG_FILE
) ) {
121 require_once "$IP/includes/NoLocalSettings.php";
125 # Include site settings. $IP may be changed (hopefully before the AutoLoader is invoked)
126 require_once MW_CONFIG_FILE
;
129 # Initialise output buffering
130 # Check that there is no previous output or previously set up buffers, because
131 # that would cause us to potentially mix gzip and non-gzip output, creating a
133 if ( ob_get_level() == 0 ) {
134 require_once "$IP/includes/OutputHandler.php";
135 ob_start( 'wfOutputHandler' );
138 require_once "$IP/includes/Setup.php";
140 # Multiple DBs or commits might be used; keep the request as transactional as possible
141 if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] === 'POST' ) {
142 ignore_user_abort( true );
145 if ( !defined( 'MW_API' ) &&
146 RequestContext
::getMain()->getRequest()->getHeader( 'Promise-Non-Write-API-Action' )
148 header( 'Cache-Control: no-cache' );
149 header( 'Content-Type: text/html; charset=utf-8' );
150 HttpStatus
::header( 400 );
151 $error = wfMessage( 'nonwrite-api-promise-error' )->escaped();
155 <head><meta charset="UTF-8" /></head>
162 header( 'Content-Length: ' . strlen( $content ) );