includes/PHPVersionCheck.php

   1 <?php
   2 /**
   3  * Check PHP Version, as well as for composer dependencies in entry points,
   4  * and display something vaguely comprehensible in the event of a totally
   5  * unrecoverable error.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  */
  24
  25 /**
  26  * Check php version and that external dependencies are installed, and
  27  * display an informative error if either condition is not satisfied.
  28  *
  29  * @note Since we can't rely on anything, the minimum PHP versions and MW current
  30  * version are hardcoded here
  31  */
  32 function wfEntryPointCheck( $entryPoint ) {
  33         $mwVersion = '1.27';
  34         $minimumVersionPHP = '5.3.3';
  35         $phpVersion = PHP_VERSION;
  36
  37         if ( !function_exists( 'version_compare' )
  38                 || version_compare( $phpVersion, $minimumVersionPHP ) < 0
  39         ) {
  40                 wfPHPVersionError( $entryPoint, $mwVersion, $minimumVersionPHP, $phpVersion );
  41         }
  42
  43         // @codingStandardsIgnoreStart MediaWiki.Usage.DirUsage.FunctionFound
  44         if ( !file_exists( dirname( __FILE__ ) . '/../vendor/autoload.php' ) ) {
  45                 // @codingStandardsIgnoreEnd
  46                 wfMissingVendorError( $entryPoint, $mwVersion );
  47         }
  48 }
  49
  50 /**
  51  * Display something vaguely comprehensible in the event of a totally unrecoverable error.
  52  * Does not assume access to *anything*; no globals, no autoloader, no database, no localisation.
  53  * Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
  54  * no longer need to be).
  55  *
  56  * Calling this function kills execution immediately.
  57  *
  58  * @param string $type Which entry point we are protecting. One of:
  59  *   - index.php
  60  *   - load.php
  61  *   - api.php
  62  *   - mw-config/index.php
  63  *   - cli
  64  * @param string $mwVersion The number of the MediaWiki version used
  65  * @param string $title HTML code to be put within an <h2> tag
  66  * @param string $shortText
  67  * @param string $longText
  68  * @param string $longHtml
  69  */
  70 function wfGenericError( $type, $mwVersion, $title, $shortText, $longText, $longHtml ) {
  71         $protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';
  72
  73         if ( $type == 'cli' ) {
  74                 $finalOutput = $longText;
  75         } else {
  76                 header( "$protocol 500 MediaWiki configuration Error" );
  77                 // Don't cache error pages!  They cause no end of trouble...
  78                 header( 'Cache-control: none' );
  79                 header( 'Pragma: no-cache' );
  80
  81                 if ( $type == 'index.php' || $type == 'mw-config/index.php' ) {
  82                         $pathinfo = pathinfo( $_SERVER['SCRIPT_NAME'] );
  83                         if ( $type == 'mw-config/index.php' ) {
  84                                 $dirname = dirname( $pathinfo['dirname'] );
  85                         } else {
  86                                 $dirname = $pathinfo['dirname'];
  87                         }
  88                         $encLogo = htmlspecialchars(
  89                                 str_replace( '//', '/', $dirname . '/' ) .
  90                                 'resources/assets/mediawiki.png'
  91                         );
  92                         $shortHtml = htmlspecialchars( $shortText );
  93
  94                         header( 'Content-type: text/html; charset=UTF-8' );
  95
  96                         $finalOutput = <<<HTML
  97 <!DOCTYPE html>
  98 <html lang="en" dir="ltr">
  99         <head>
 100                 <meta charset="UTF-8" />
 101                 <title>MediaWiki {$mwVersion}</title>
 102                 <style media='screen'>
 103                         body {
 104                                 color: #000;
 105                                 background-color: #fff;
 106                                 font-family: sans-serif;
 107                                 padding: 2em;
 108                                 text-align: center;
 109                         }
 110                         p, img, h1, h2 {
 111                                 text-align: left;
 112                                 margin: 0.5em 0 1em;
 113                         }
 114                         h1 {
 115                                 font-size: 120%;
 116                         }
 117                         h2 {
 118                                 font-size: 110%;
 119                         }
 120                 </style>
 121         </head>
 122         <body>
 123                 <img src="{$encLogo}" alt='The MediaWiki logo' />
 124                 <h1>MediaWiki {$mwVersion} internal error</h1>
 125                 <div class='error'>
 126                 <p>
 127                         {$shortHtml}
 128                 </p>
 129                 <h2>{$title}</h2>
 130                 <p>
 131                         {$longHtml}
 132                 </p>
 133                 </div>
 134         </body>
 135 </html>
 136 HTML;
 137                 // Handle everything that's not index.php
 138                 } else {
 139                         // So nothing thinks this is JS or CSS
 140                         $finalOutput = ( $type == 'load.php' ) ? "/* $shortText */" : $shortText;
 141                 }
 142         }
 143         echo "$finalOutput\n";
 144         die( 1 );
 145 }
 146
 147 /**
 148  * Display an error for the minimum PHP version requirement not being satisfied.
 149  *
 150  * @param string $type See wfGenericError
 151  * @param string $mwVersion See wfGenericError
 152  * @param string $minimumVersionPHP The minimum PHP version supported by MediaWiki
 153  * @param string $phpVersion The current PHP version
 154  */
 155 function wfPHPVersionError( $type, $mwVersion, $minimumVersionPHP, $phpVersion ) {
 156         $shortText = "MediaWiki $mwVersion requires at least "
 157                 . "PHP version $minimumVersionPHP, you are using PHP $phpVersion.";
 158
 159         $longText = "Error: You might be using on older PHP version. \n"
 160                 . "MediaWiki $mwVersion needs PHP $minimumVersionPHP or higher.\n\n"
 161                 . "Check if you have a newer php executable with a different name, such as php5.\n\n";
 162
 163         $longHtml = <<<HTML
 164                         Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
 165                         PHP versions less than 5.5.0 are no longer supported by the PHP Group and will not receive
 166                         security or bugfix updates.
 167                 </p>
 168                 <p>
 169                         If for some reason you are unable to upgrade your PHP version, you will need to
 170                         <a href="https://www.mediawiki.org/wiki/Download">download</a> an older version
 171                         of MediaWiki from our website.  See our
 172                         <a href="https://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
 173                         for details of which versions are compatible with prior versions of PHP.
 174 HTML;
 175         wfGenericError( $type, $mwVersion, 'Supported PHP versions', $shortText, $longText, $longHtml );
 176 }
 177
 178 /**
 179  * Display an error for the vendor/autoload.php file not being found.
 180  *
 181  * @param string $type See wfGenericError
 182  * @param string $mwVersion See wfGenericError
 183  */
 184 function wfMissingVendorError( $type, $mwVersion ) {
 185         $shortText = "Installing some external dependencies (e.g. via composer) is required.";
 186
 187         $longText = "Error: You are missing some external dependencies. \n"
 188                 . "MediaWiki now also has some external dependencies that need to be installed\n"
 189                 . "via composer or from a separate git repo. Please see\n"
 190                 . "https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries\n"
 191                 . "for help on installing the required components.";
 192
 193         // @codingStandardsIgnoreStart Generic.Files.LineLength
 194         $longHtml = <<<HTML
 195                 MediaWiki now also has some external dependencies that need to be installed via
 196                 composer or from a separate git repo. Please see
 197                 <a href="https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries">mediawiki.org</a>
 198                 for help on installing the required components.
 199 HTML;
 200         // @codingStandardsIgnoreEnd
 201
 202         wfGenericError( $type, $mwVersion, 'External dependencies', $shortText, $longText, $longHtml );
 203 }