includes/PHPVersionError.php

   1 <?php
   2 /**
   3  * Display something vaguely comprehensible in the event of a totally unrecoverable error.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Display something vaguely comprehensible in the event of a totally unrecoverable error.
  25  * Does not assume access to *anything*; no globals, no autloader, no database, no localisation.
  26  * Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
  27  * no longer need to be).
  28  *
  29  * Calling this function kills execution immediately.
  30  *
  31  * @param string $type Which entry point we are protecting. One of:
  32  *   - index.php
  33  *   - load.php
  34  *   - api.php
  35  *   - cli
  36  *
  37  * @note Since we can't rely on anything, the minimum PHP versions and MW current
  38  * version are hardcoded here
  39  */
  40 function wfPHPVersionError( $type ) {
  41         $mwVersion = '1.21';
  42         $phpVersion = PHP_VERSION;
  43         $message = "MediaWiki $mwVersion requires at least PHP version 5.3.2, you are using PHP $phpVersion.";
  44         if( $type == 'index.php' ) {
  45                 $encLogo = htmlspecialchars(
  46                         str_replace( '//', '/', pathinfo( $_SERVER['SCRIPT_NAME'], PATHINFO_DIRNAME ) . '/'
  47                         ) . 'skins/common/images/mediawiki.png'
  48                 );
  49
  50                 header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
  51                 header( 'Content-type: text/html; charset=UTF-8' );
  52                 // Don't cache error pages!  They cause no end of trouble...
  53                 header( 'Cache-control: none' );
  54                 header( 'Pragma: nocache' );
  55
  56                 $finalOutput = <<<HTML
  57 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  58 <html xmlns='http://www.w3.org/1999/xhtml' lang='en'>
  59         <head>
  60                 <title>MediaWiki {$mwVersion}</title>
  61                 <meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
  62                 <style type='text/css' media='screen'>
  63                         body {
  64                                 color: #000;
  65                                 background-color: #fff;
  66                                 font-family: sans-serif;
  67                                 padding: 2em;
  68                                 text-align: center;
  69                         }
  70                         p, img, h1 {
  71                                 text-align: left;
  72                                 margin: 0.5em 0;
  73                         }
  74                         h1 {
  75                                 font-size: 120%;
  76                         }
  77                 </style>
  78         </head>
  79         <body>
  80                 <img src="{$encLogo}" alt='The MediaWiki logo' />
  81                 <h1>MediaWiki {$mwVersion} internal error</h1>
  82                 <div class='error'>
  83                 <p>
  84                         {$message}
  85                 </p>
  86                 <p>
  87                         Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
  88                         PHP versions less than 5.3.0 are no longer supported by the PHP Group and will not receive
  89                         security or bugfix updates.
  90                 </p>
  91                 <p>
  92                         If for some reason you are unable to upgrade your PHP version, you will need to
  93                         <a href="http://www.mediawiki.org/wiki/Download">download</a> an older version
  94                         of MediaWiki from our website.  See our
  95                         <a href="http://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
  96                         for details of which versions are compatible with prior versions of PHP.
  97                 </p>
  98                 </div>
  99         </body>
 100 </html>
 101 HTML;
 102         // Handle everything that's not index.php
 103         } else {
 104                 // So nothing thinks this is JS or CSS
 105                 $finalOutput = ( $type == 'load.php' ) ? "/* $message */" : $message;
 106                 if( $type != 'cli' ) {
 107                         header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
 108                 }
 109         }
 110         echo( "$finalOutput\n" );
 111         die( 1 );
 112 }