includes/WebStart.php

   1 <?php
   2 /**
   3  * This does the initial setup 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  * @file
   9  */
  10
  11 # Protect against register_globals
  12 # This must be done before any globals are set by the code
  13 if ( ini_get( 'register_globals' ) ) {
  14         if ( isset( $_REQUEST['GLOBALS'] ) ) {
  15                 die( '<a href="http://www.hardened-php.net/globals-problem">$GLOBALS overwrite vulnerability</a>');
  16         }
  17         $verboten = array(
  18                 'GLOBALS',
  19                 '_SERVER',
  20                 'HTTP_SERVER_VARS',
  21                 '_GET',
  22                 'HTTP_GET_VARS',
  23                 '_POST',
  24                 'HTTP_POST_VARS',
  25                 '_COOKIE',
  26                 'HTTP_COOKIE_VARS',
  27                 '_FILES',
  28                 'HTTP_POST_FILES',
  29                 '_ENV',
  30                 'HTTP_ENV_VARS',
  31                 '_REQUEST',
  32                 '_SESSION',
  33                 'HTTP_SESSION_VARS'
  34         );
  35         foreach ( $_REQUEST as $name => $value ) {
  36                 if( in_array( $name, $verboten ) ) {
  37                         header( "HTTP/1.x 500 Internal Server Error" );
  38                         echo "register_globals security paranoia: trying to overwrite superglobals, aborting.";
  39                         die( -1 );
  40                 }
  41                 unset( $GLOBALS[$name] );
  42         }
  43 }
  44
  45 $wgRequestTime = microtime(true);
  46 # getrusage() does not exist on the Microsoft Windows platforms, catching this
  47 if ( function_exists ( 'getrusage' ) ) {
  48         $wgRUstart = getrusage();
  49 } else {
  50         $wgRUstart = array();
  51 }
  52 unset( $IP );
  53
  54 # Valid web server entry point, enable includes.
  55 # Please don't move this line to includes/Defines.php. This line essentially
  56 # defines a valid entry point. If you put it in includes/Defines.php, then
  57 # any script that includes it becomes an entry point, thereby defeating
  58 # its purpose.
  59 define( 'MEDIAWIKI', true );
  60
  61 # Full path to working directory.
  62 # Makes it possible to for example to have effective exclude path in apc.
  63 # Also doesn't break installations using symlinked includes, like
  64 # dirname( __FILE__ ) would do.
  65 $IP = getenv( 'MW_INSTALL_PATH' );
  66 if ( $IP === false ) {
  67         $IP = realpath( '.' );
  68 }
  69
  70
  71 # Start profiler
  72 if( file_exists("$IP/StartProfiler.php") ) {
  73         require_once( "$IP/StartProfiler.php" );
  74 } else {
  75         require_once( "$IP/includes/ProfilerStub.php" );
  76 }
  77 wfProfileIn( 'WebStart.php-conf' );
  78
  79 # Load up some global defines.
  80 require_once( "$IP/includes/Defines.php" );
  81
  82 # Check for PHP 5
  83 if ( !function_exists( 'version_compare' )
  84         || version_compare( phpversion(), '5.0.0' ) < 0
  85 ) {
  86         define( 'MW_PHP4', '1' );
  87         require( "$IP/includes/DefaultSettings.php" );
  88         require( "$IP/includes/templates/PHP4.php" );
  89         exit;
  90 }
  91
  92 # Start the autoloader, so that extensions can derive classes from core files
  93 require_once( "$IP/includes/AutoLoader.php" );
  94 # Load default settings
  95 require_once( "$IP/includes/DefaultSettings.php" );
  96
  97 if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
  98         # Use a callback function to configure MediaWiki
  99         MWFunction::call( MW_CONFIG_CALLBACK );
 100
 101 } else {
 102         if ( !defined('MW_CONFIG_FILE') )
 103                 define('MW_CONFIG_FILE', "$IP/LocalSettings.php");
 104
 105         # LocalSettings.php is the per site customization file. If it does not exist
 106         # the wiki installer needs to be launched or the generated file moved from
 107         # ./config/ to ./
 108         if( !file_exists( MW_CONFIG_FILE ) ) {
 109                 require_once( "$IP/includes/templates/NoLocalSettings.php" );
 110                 die();
 111         }
 112
 113         # Include site settings. $IP may be changed (hopefully before the AutoLoader is invoked)
 114         require_once( MW_CONFIG_FILE );
 115 }
 116
 117 if ( $wgEnableSelenium ) {
 118         require_once( "$IP/includes/SeleniumWebSettings.php" );
 119 }
 120
 121 wfProfileOut( 'WebStart.php-conf' );
 122
 123 wfProfileIn( 'WebStart.php-ob_start' );
 124 # Initialise output buffering
 125 # Check that there is no previous output or previously set up buffers, because
 126 # that would cause us to potentially mix gzip and non-gzip output, creating a
 127 # big mess.
 128 if ( !defined( 'MW_NO_OUTPUT_BUFFER' ) && ob_get_level() == 0 ) {
 129         require_once( "$IP/includes/OutputHandler.php" );
 130         ob_start( 'wfOutputHandler' );
 131 }
 132 wfProfileOut( 'WebStart.php-ob_start' );
 133
 134 if ( !defined( 'MW_NO_SETUP' ) ) {
 135         require_once( "$IP/includes/Setup.php" );
 136 }
 137