includes/WebStart.php

   1 <?php
   2 /**
   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.
   7  *
   8  * Setup.php (if loaded) then sets up GlobalFunctions, the AutoLoader,
   9  * and the configuration globals.
  10  *
  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.
  15  *
  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.
  20  *
  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
  25  *
  26  * @file
  27  */
  28
  29 # Die if register_globals is enabled (PHP <=5.3)
  30 # This must be done before any globals are set by the code
  31 if ( ini_get( 'register_globals' ) ) {
  32         die( 'MediaWiki does not support installations where register_globals is enabled. '
  33                 . 'Please see <a href="https://www.mediawiki.org/wiki/register_globals">mediawiki.org</a> '
  34                 . 'for help on how to disable it.' );
  35 }
  36
  37 # bug 15461: Make IE8 turn off content sniffing. Everybody else should ignore this
  38 # We're adding it here so that it's *always* set, even for alternate entry
  39 # points and when $wgOut gets disabled or overridden.
  40 header( 'X-Content-Type-Options: nosniff' );
  41
  42 $wgRequestTime = microtime( true );
  43 unset( $IP );
  44
  45 # Valid web server entry point, enable includes.
  46 # Please don't move this line to includes/Defines.php. This line essentially
  47 # defines a valid entry point. If you put it in includes/Defines.php, then
  48 # any script that includes it becomes an entry point, thereby defeating
  49 # its purpose.
  50 define( 'MEDIAWIKI', true );
  51
  52 # Full path to working directory.
  53 # Makes it possible to for example to have effective exclude path in apc.
  54 # __DIR__ breaks symlinked includes, but realpath() returns false
  55 # if we don't have permissions on parent directories.
  56 $IP = getenv( 'MW_INSTALL_PATH' );
  57 if ( $IP === false ) {
  58         $IP = realpath( '.' ) ?: dirname( __DIR__ );
  59 }
  60
  61 # Grab profiling functions
  62 require_once "$IP/includes/profiler/ProfilerFunctions.php";
  63 $wgRUstart = wfGetRusage() ?: array();
  64
  65 # Start the autoloader, so that extensions can derive classes from core files
  66 require_once "$IP/includes/AutoLoader.php";
  67
  68 # Load up some global defines.
  69 require_once "$IP/includes/Defines.php";
  70
  71 # Start the profiler
  72 $wgProfiler = array();
  73 if ( file_exists( "$IP/StartProfiler.php" ) ) {
  74         require "$IP/StartProfiler.php";
  75 }
  76
  77 wfProfileIn( 'WebStart.php-conf' );
  78
  79 # Load default settings
  80 require_once "$IP/includes/DefaultSettings.php";
  81
  82 # Load global functions
  83 require_once "$IP/includes/GlobalFunctions.php";
  84
  85 # Load composer's autoloader if present
  86 if ( is_readable( "$IP/vendor/autoload.php" ) ) {
  87         require_once "$IP/vendor/autoload.php";
  88 }
  89
  90 if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
  91         # Use a callback function to configure MediaWiki
  92         call_user_func( MW_CONFIG_CALLBACK );
  93 } else {
  94         if ( !defined( 'MW_CONFIG_FILE' ) ) {
  95                 define( 'MW_CONFIG_FILE', "$IP/LocalSettings.php" );
  96         }
  97
  98         # LocalSettings.php is the per site customization file. If it does not exist
  99         # the wiki installer needs to be launched or the generated file uploaded to
 100         # the root wiki directory. Give a hint, if it is not readable by the server.
 101         if ( !is_readable( MW_CONFIG_FILE ) ) {
 102                 require_once "$IP/includes/templates/NoLocalSettings.php";
 103                 die();
 104         }
 105
 106         # Include site settings. $IP may be changed (hopefully before the AutoLoader is invoked)
 107         require_once MW_CONFIG_FILE;
 108 }
 109
 110 wfProfileOut( 'WebStart.php-conf' );
 111
 112 wfProfileIn( 'WebStart.php-ob_start' );
 113 # Initialise output buffering
 114 # Check that there is no previous output or previously set up buffers, because
 115 # that would cause us to potentially mix gzip and non-gzip output, creating a
 116 # big mess.
 117 if ( ob_get_level() == 0 ) {
 118         require_once "$IP/includes/OutputHandler.php";
 119         ob_start( 'wfOutputHandler' );
 120 }
 121 wfProfileOut( 'WebStart.php-ob_start' );
 122
 123 if ( !defined( 'MW_NO_SETUP' ) ) {
 124         require_once "$IP/includes/Setup.php";
 125 }