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 autoloader, 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  *   - mw-config/index.php
  36  *   - cli
  37  *
  38  * @note Since we can't rely on anything, the minimum PHP versions and MW current
  39  * version are hardcoded here
  40  */
  41 function wfPHPVersionError( $type ) {
  42         $mwVersion = '1.24';
  43         $minimumVersionPHP = '5.3.2';
  44
  45         $phpVersion = PHP_VERSION;
  46         $protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';
  47         $message = "MediaWiki $mwVersion requires at least "
  48                 . "PHP version $minimumVersionPHP, you are using PHP $phpVersion.";
  49
  50         if ( $type == 'cli' ) {
  51                 $finalOutput = "You are using PHP version $phpVersion "
  52                         . "but MediaWiki $mwVersion needs PHP $minimumVersionPHP or higher. ABORTING.\n"
  53                         . "Check if you have a newer php executable with a different name, such as php5.\n";
  54         } elseif ( $type == 'index.php' || $type == 'mw-config/index.php' ) {
  55                 $pathinfo = pathinfo( $_SERVER['SCRIPT_NAME'] );
  56                 if ( $type == 'mw-config/index.php' ) {
  57                         $dirname = dirname( $pathinfo['dirname'] );
  58                 } else {
  59                         $dirname = $pathinfo['dirname'];
  60                 }
  61                 $encLogo = htmlspecialchars(
  62                         str_replace( '//', '/', $dirname . '/' ) .
  63                         'assets/mediawiki.png'
  64                 );
  65
  66                 header( "$protocol 500 MediaWiki configuration Error" );
  67                 header( 'Content-type: text/html; charset=UTF-8' );
  68                 // Don't cache error pages!  They cause no end of trouble...
  69                 header( 'Cache-control: none' );
  70                 header( 'Pragma: no-cache' );
  71
  72                 $finalOutput = <<<HTML
  73 <!DOCTYPE html>
  74 <html lang="en" dir="ltr">
  75         <head>
  76                 <meta charset="UTF-8" />
  77                 <title>MediaWiki {$mwVersion}</title>
  78                 <style media='screen'>
  79                         body {
  80                                 color: #000;
  81                                 background-color: #fff;
  82                                 font-family: sans-serif;
  83                                 padding: 2em;
  84                                 text-align: center;
  85                         }
  86                         p, img, h1 {
  87                                 text-align: left;
  88                                 margin: 0.5em 0;
  89                         }
  90                         h1 {
  91                                 font-size: 120%;
  92                         }
  93                 </style>
  94         </head>
  95         <body>
  96                 <img src="{$encLogo}" alt='The MediaWiki logo' />
  97                 <h1>MediaWiki {$mwVersion} internal error</h1>
  98                 <div class='error'>
  99                 <p>
 100                         {$message}
 101                 </p>
 102                 <p>
 103                         Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
 104                         PHP versions less than 5.3.0 are no longer supported by the PHP Group and will not receive
 105                         security or bugfix updates.
 106                 </p>
 107                 <p>
 108                         If for some reason you are unable to upgrade your PHP version, you will need to
 109                         <a href="https://www.mediawiki.org/wiki/Download">download</a> an older version
 110                         of MediaWiki from our website.  See our
 111                         <a href="https://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
 112                         for details of which versions are compatible with prior versions of PHP.
 113                 </p>
 114                 </div>
 115         </body>
 116 </html>
 117 HTML;
 118         // Handle everything that's not index.php
 119         } else {
 120                 // So nothing thinks this is JS or CSS
 121                 $finalOutput = ( $type == 'load.php' ) ? "/* $message */" : $message;
 122                 header( "$protocol 500 MediaWiki configuration Error" );
 123         }
 124         echo "$finalOutput\n";
 125         die( 1 );
 126 }