3 * This does the initial set up for a web request.
4 * It does some security checks, starts the profiler and loads the
5 * configuration, and optionally loads Setup.php depending on whether
6 * MW_NO_SETUP is defined.
8 * Setup.php (if loaded) then sets up GlobalFunctions, the AutoLoader,
9 * and the configuration globals.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 * http://www.gnu.org/copyleft/gpl.html
30 # bug 15461: Make IE8 turn off content sniffing. Everybody else should ignore this
31 # We're adding it here so that it's *always* set, even for alternate entry
32 # points and when $wgOut gets disabled or overridden.
33 header( 'X-Content-Type-Options: nosniff' );
35 # Approximate $_SERVER['REQUEST_TIME_FLOAT'] for PHP<5.4
36 if ( !isset( $_SERVER['REQUEST_TIME_FLOAT'] ) ) {
37 $_SERVER['REQUEST_TIME_FLOAT'] = microtime( true );
41 * @var float Request start time as fractional seconds since epoch
42 * @deprecated since 1.25; use $_SERVER['REQUEST_TIME_FLOAT'] or
43 * WebRequest::getElapsedTime() instead.
45 $wgRequestTime = $_SERVER['REQUEST_TIME_FLOAT'];
49 # Valid web server entry point, enable includes.
50 # Please don't move this line to includes/Defines.php. This line essentially
51 # defines a valid entry point. If you put it in includes/Defines.php, then
52 # any script that includes it becomes an entry point, thereby defeating
54 define( 'MEDIAWIKI', true );
56 # Full path to working directory.
57 # Makes it possible to for example to have effective exclude path in apc.
58 # __DIR__ breaks symlinked includes, but realpath() returns false
59 # if we don't have permissions on parent directories.
60 $IP = getenv( 'MW_INSTALL_PATH' );
61 if ( $IP === false ) {
62 $IP = realpath( '.' ) ?
: dirname( __DIR__
);
65 # Grab profiling functions
66 require_once "$IP/includes/profiler/ProfilerFunctions.php";
68 # Start the autoloader, so that extensions can derive classes from core files
69 require_once "$IP/includes/AutoLoader.php";
71 # Load up some global defines.
72 require_once "$IP/includes/Defines.php";
75 $wgProfiler = array();
76 if ( file_exists( "$IP/StartProfiler.php" ) ) {
77 require "$IP/StartProfiler.php";
80 # Load default settings
81 require_once "$IP/includes/DefaultSettings.php";
83 # Load global functions
84 require_once "$IP/includes/GlobalFunctions.php";
86 # Load composer's autoloader if present
87 if ( is_readable( "$IP/vendor/autoload.php" ) ) {
88 require_once "$IP/vendor/autoload.php";
91 # Assert that composer dependencies were successfully loaded
92 # Purposely no leading \ due to it breaking HHVM RepoAuthorative mode
93 # PHP works fine with both versions
94 # See https://github.com/facebook/hhvm/issues/5833
95 if ( !interface_exists( 'Psr\Log\LoggerInterface' ) ) {
97 'MediaWiki requires the <a href="https://github.com/php-fig/log">PSR-3 logging ' .
98 "library</a> to be present. This library is not embedded directly in MediaWiki's " .
99 "git repository and must be installed separately by the end user.\n\n" .
100 'Please see <a href="https://www.mediawiki.org/wiki/Download_from_Git' .
101 '#Fetch_external_libraries">mediawiki.org</a> for help on installing ' .
102 'the required components.'
105 trigger_error( $message, E_USER_ERROR
);
109 if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
110 # Use a callback function to configure MediaWiki
111 call_user_func( MW_CONFIG_CALLBACK
);
113 if ( !defined( 'MW_CONFIG_FILE' ) ) {
114 define( 'MW_CONFIG_FILE', "$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 if ( !defined( 'MW_NO_SETUP' ) ) {
139 require_once "$IP/includes/Setup.php";
142 # Multiple DBs or commits might be used; keep the request as transactional as possible
143 if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] === 'POST' ) {
144 ignore_user_abort( true );
147 if ( !defined( 'MW_API' ) &&
148 RequestContext
::getMain()->getRequest()->getHeader( 'Promise-Non-Write-API-Action' )
150 header( 'Cache-Control: no-cache' );
151 header( 'Content-Type: text/html; charset=utf-8' );
152 HttpStatus
::header( 400 );
153 $error = wfMessage( 'nonwrite-api-promise-error' )->escaped();
157 <head><meta charset="UTF-8" /></head>
164 header( 'Content-Length: ' . strlen( $content ) );