突破：在MediaWiki页面中嵌入PHP程序

多共享，多交流

不客气，有技术问题多共享、多交流，我也是从别人的文章中学到很多，希望自己的一些记录也能帮得上别人。

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这个扩展没有文档，就只有一个文件，复制如下供参考：

<?php
if (!defined ('MEDIAWIKI')) {
  echo 'This is a MediaWiki-Extension and not meant to be run standalone!';
  exit (1);
}

$wgExtensionCredits['parserhook'] [] = array (
  'name'             => 'include_PHP',
  'author'           => 'Jannis Achstetter',
  'url'              => 'http://www.mediawiki.org/wiki/Extension:Include_PHP',                                                                                                                                                               
  'description'      => 'Allows you to include PHP-files that are executed and their output shown on the wiki-page',                                                                      
  'version'          => 2,                                                                                                                                                                
  'path'             => __FILE__,                                                                                                                                                         
);                                                                                                                                                                                        

// We register our function "include_PHPParserHook" to the tag <include_PHP />                                                                                                            
// A filename of a file to be included must be given. For example:                                                                                                                        
// <include_PHP file="phpinfo" />                                                                                                                                                         
// Files are searched in the "$IP/scripting"-folder and have the .php-extension.                                                                                                          
// This extension must not be given with the file=-parameter; it is appended                                                                                                              
//                                                                                                                                                                                        
// We parse the PHP in the "include_PHPParserHook"-function. The resulting text                                                                                                           
// is not yet returned to the Wiki-page, only a marker is placed there. The                                                                                                               
// output it stored in the array $markerList.                                                                                                                                             
// In the "include_PHPParserAfterTidy"-function, the markers are replaced by
// the real output. This way, we can output HTML that is not touched by
// MediaWiki's parser.

$wgHooks['ParserAfterTidy'][] = 'include_PHPParserAfterTidy';
$wgHooks['ParserFirstCallInit'][] = 'include_PHPSetup';

function include_PHPSetup (&$parser) {
  $parser->setHook( 'include_PHP', 'include_PHPParserHook' );
  return true;
}

$markerList = array();
function include_PHPParserHook ($input, $argv, $parser) {
  global $markerList;

  // Disable page caching since the PHP-output is dynamic
//jamesqi 2011-5-7  $parser->disableCache();

  // Sanity checking: allow execution only if the currently viewed Revision
  // was created/edited by a user with the "scripting"-permission
  $user = User::newFromName ($parser->getRevisionUser());
  $user->load();
  if (!$user->isAllowed ('scripting')) {
    $output = 'include_PHP: The revision you are viewing was created by a user that does not have the permissions to include PHP code! I won\'t execute that!';
  } else {
    // No file-parameter has been given! Nothing to do for us :)
    if (!array_key_exists("file", $argv)) {
      $output = 'include_PHP: No script-file to be included given!';
    } else {
      // Check for evil directory traversal (alias "../")-attacks
      // note the 3 "="-signs in the comparison!
      if (!(strpos($argv['file'], '../') === FALSE)) {
        $output = 'include_PHP: Possible directory-traversal attack! Why do you have "../" in the filename?';
      } else {
        // A file-parameter has been given! Check if it exists and is readable
        if (!is_readable('scripting/'.$argv['file'].'.php')) {
          $output = 'include_PHP: File to be included does not exist!';
        } else {
          // Actual parsing is done here!
          // Use ob_start so things like phpinfo() put their output inside the wiki-page "body-text", not on top of it
          ob_start();
          include('scripting/'.$argv['file'].'.php');
          $output = trim(ob_get_clean());
        }
      }
    }
  }

  // Get a new marker, store the output there and
  // insert it's name onto the (yet to be parsed) page
  $markercount = count($markerList);
  $marker = "xy-include_PHP-marker-".$markercount."-xy";

  global $include_PHP_override_marker;
  if ($include_PHP_override_marker) {
    $markerList[$markercount] = $include_PHP_override_marker;
  } else {
    $markerList[$markercount] = $output;
  }
  return $marker;
}

// find markers in $text
// replace markers with actual output
function include_PHPParserAfterTidy ($parser, &$text) {
  global $markerList;

  // Disable page caching since the PHP-output is dynamic
//jamesqi2011-5-7  $parser->disableCache();

  $keys = array();
  $marker_count = count($markerList);

  for ($i = 0; $i < $marker_count; $i++) {
    $keys[] = 'xy-include_PHP-marker-'.$i.'-xy';
  }

  $text = str_replace($keys, $markerList, $text);
  return true;
}
?>

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