2164 }

  2165 

  2166 /**

  2167  * Portal function allowing spam-filtering plugins.

  2168  * Hooking guide:

  2169  *   - Attach to spam_check

  2170  *   - Return either true or false - true if the message is spam-free, false if it fails your test

  2171  * @example

  2172  <code>

  2173  $plugins->attachHook('spam_check', 'return my_spam_check($string);');

  2174  function my_spam_check($string)

  2175  {

  2176    if ( stristr($string, 'viagra') )

  2177      return false;

  2178    

  2179    return true;

  2180  }

  2181  </code>

  2182  * @param string String to check for spam

  2183  * @param string Author name

  2184  * @param string Author e-mail

  2185  * @param string Author website

  2186  * @param string Author IP

  2187  * @return bool

  2188  */

  2189 

  2190 function spamalyze($string, $name = false, $email = false, $url = false, $ip = false)

  2191 {

  2192   global $db, $session, $paths, $template, $plugins; // Common objects

  2193   if ( !$ip )

  2194     $ip =& $_SERVER['REMOTE_ADDR'];

  2195   

  2196   $code = $plugins->setHook('spam_check');

  2197   foreach ( $code as $cmd )

  2198   {

  2199     $result = eval($cmd);

  2200     if ( !$result )

  2201       return false;

  2202   }

  2203   return true;