includes/WebStart.php

   1 <?php
   2 /**
   3  * This does the initial set up for a web request, including a few
   4  * security checks and loading the initializer.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  */
  23
  24 # Die if register_globals is enabled (PHP <=5.3)
  25 # This must be done before any globals are set by the code
  26 if ( ini_get( 'register_globals' ) ) {
  27         die( 'MediaWiki does not support installations where register_globals is enabled. '
  28                 . 'Please see <a href="https://www.mediawiki.org/wiki/register_globals">mediawiki.org</a> '
  29                 . 'for help on how to disable it.' );
  30 }
  31
  32 # bug 15461: 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' );
  36
  37 # getrusage() does not exist on the Microsoft Windows platforms, catching this
  38 $wgRUstart = function_exists( 'getrusage' ) ? getrusage() : array();
  39 unset( $IP );
  40
  41 # Full path to working directory.
  42 # Makes it possible to for example to have effective exclude path in apc.
  43 # __DIR__ breaks symlinked includes, but realpath() returns false
  44 # if we don't have permissions on parent directories.
  45 $IP = getenv( 'MW_INSTALL_PATH' );
  46 if ( $IP === false ) {
  47         $IP = realpath( '.' ) ?: dirname( __DIR__ );
  48 }
  49
  50 require_once "$IP/includes/Initialize.php";
  51
  52 wfProfileIn( 'WebStart.php-conf' );
  53
  54 if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
  55         # Use a callback function to configure MediaWiki
  56         call_user_func( MW_CONFIG_CALLBACK );
  57 } else {
  58         if ( !defined( 'MW_CONFIG_FILE' ) ) {
  59                 define( 'MW_CONFIG_FILE', "$IP/LocalSettings.php" );
  60         }
  61
  62         # LocalSettings.php is the per site customization file. If it does not exist
  63         # the wiki installer needs to be launched or the generated file uploaded to
  64         # the root wiki directory. Give a hint, if it is not readable by the server.
  65         if ( !is_readable( MW_CONFIG_FILE ) ) {
  66                 require_once "$IP/includes/templates/NoLocalSettings.php";
  67                 die();
  68         }
  69
  70         # Include site settings. $IP may be changed (hopefully before the AutoLoader is invoked)
  71         require_once MW_CONFIG_FILE;
  72 }
  73
  74 wfProfileOut( 'WebStart.php-conf' );
  75
  76 wfProfileIn( 'WebStart.php-ob_start' );
  77 # Initialise output buffering
  78 # Check that there is no previous output or previously set up buffers, because
  79 # that would cause us to potentially mix gzip and non-gzip output, creating a
  80 # big mess.
  81 if ( !defined( 'MW_NO_OUTPUT_BUFFER' ) && ob_get_level() == 0 ) {
  82         require_once "$IP/includes/OutputHandler.php";
  83         ob_start( 'wfOutputHandler' );
  84 }
  85 wfProfileOut( 'WebStart.php-ob_start' );
  86
  87 if ( !defined( 'MW_NO_SETUP' ) ) {
  88         require_once "$IP/includes/Setup.php";
  89 }