site_media/xinha/contrib/php-xinha.php

   1 <?php
   2   /** Write the appropriate xinha_config directives to pass data to a PHP (Plugin) backend file.
   3    *
   4    *  ImageManager Example:
   5    *  The following would be placed in step 3 of your configuration (see the NewbieGuide
   6    *  (http://xinha.python-hosting.com/wiki/NewbieGuide)
   7    *
   8    * <script language="javascript">
   9    *  with (xinha_config.ImageManager)
  10    *  {
  11    *    <?php
  12    *      xinha_pass_to_php_backend
  13    *      (
  14    *        array
  15    *        (
  16    *         'images_dir' => '/home/your/directory',
  17    *         'images_url' => '/directory'
  18    *        )
  19    *      )
  20    *    ?>
  21    *  }
  22    *  </script>
  23    *
  24    */
  25
  26   function xinha_pass_to_php_backend($Data, $KeyLocation = 'Xinha:BackendKey', $ReturnPHP = FALSE)
  27   {
  28
  29     $bk = array();
  30     $bk['data']       = serialize($Data);
  31
  32     @session_start();
  33     if(!isset($_SESSION[$KeyLocation]))
  34     {
  35       $_SESSION[$KeyLocation] = uniqid('Key_');
  36     }
  37
  38     $bk['session_name'] = session_name();
  39     $bk['key_location'] = $KeyLocation;
  40     $bk['hash']         =
  41       function_exists('sha1') ?
  42         sha1($_SESSION[$KeyLocation] . $bk['data'])
  43       : md5($_SESSION[$KeyLocation] . $bk['data']);
  44
  45
  46     // The data will be passed via a postback to the
  47     // backend, we want to make sure these are going to come
  48     // out from the PHP as an array like $bk above, so
  49     // we need to adjust the keys.
  50     $backend_data = array();
  51     foreach($bk as $k => $v)
  52     {
  53       $backend_data["backend_data[$k]"] = $v;
  54     }
  55
  56     // The session_start() above may have been after data was sent, so cookies
  57     // wouldn't have worked.
  58     $backend_data[session_name()] = session_id();
  59
  60     if($ReturnPHP)
  61     {
  62       return array('backend_data' => $backend_data);
  63     }
  64     else
  65     {
  66       echo 'backend_data = ' . xinha_to_js($backend_data) . "; \n";
  67     }
  68   }
  69
  70   /** Convert PHP data structure to Javascript */
  71
  72   function xinha_to_js($var, $tabs = 0)
  73   {
  74     if(is_numeric($var))
  75     {
  76       return $var;
  77     }
  78
  79     if(is_string($var))
  80     {
  81       return "'" . xinha_js_encode($var) . "'";
  82     }
  83
  84     if(is_array($var))
  85     {
  86       $useObject = false;
  87       foreach(array_keys($var) as $k) {
  88           if(!is_numeric($k)) $useObject = true;
  89       }
  90       $js = array();
  91       foreach($var as $k => $v)
  92       {
  93         $i = "";
  94         if($useObject) {
  95           if(preg_match('#^[a-zA-Z]+[a-zA-Z0-9]*$#', $k)) {
  96             $i .= "$k: ";
  97           } else {
  98             $i .= "'$k': ";
  99           }
 100         }
 101         $i .= xinha_to_js($v, $tabs + 1);
 102         $js[] = $i;
 103       }
 104       if($useObject) {
 105           $ret = "{\n" . xinha_tabify(implode(",\n", $js), $tabs) . "\n}";
 106       } else {
 107           $ret = "[\n" . xinha_tabify(implode(",\n", $js), $tabs) . "\n]";
 108       }
 109       return $ret;
 110     }
 111
 112     return 'null';
 113   }
 114
 115   /** Like htmlspecialchars() except for javascript strings. */
 116
 117   function xinha_js_encode($string)
 118   {
 119     static $strings = "\\,\",',%,&,<,>,{,},@,\n,\r";
 120
 121     if(!is_array($strings))
 122     {
 123       $tr = array();
 124       foreach(explode(',', $strings) as $chr)
 125       {
 126         $tr[$chr] = sprintf('\x%02X', ord($chr));
 127       }
 128       $strings = $tr;
 129     }
 130
 131     return strtr($string, $strings);
 132   }
 133
 134
 135   /** Used by plugins to get the config passed via
 136   *   xinha_pass_to_backend()
 137   *  returns either the structure given, or NULL
 138   *  if none was passed or a security error was encountered.
 139   */
 140
 141   function xinha_read_passed_data()
 142   {
 143    if(isset($_REQUEST['backend_data']) && is_array($_REQUEST['backend_data']))
 144    {
 145      $bk = $_REQUEST['backend_data'];
 146      session_name($bk['session_name']);
 147      @session_start();
 148      if(!isset($_SESSION[$bk['key_location']])) return NULL;
 149
 150      if($bk['hash']         ===
 151         function_exists('sha1') ?
 152           sha1($_SESSION[$bk['key_location']] . $bk['data'])
 153         : md5($_SESSION[$bk['key_location']] . $bk['data']))
 154      {
 155        return unserialize(ini_get('magic_quotes_gpc') ? stripslashes($bk['data']) : $bk['data']);
 156      }
 157    }
 158
 159    return NULL;
 160   }
 161
 162   /** Used by plugins to get a query string that can be sent to the backend
 163   * (or another part of the backend) to send the same data.
 164   */
 165
 166   function xinha_passed_data_querystring()
 167   {
 168    $qs = array();
 169    if(isset($_REQUEST['backend_data']) && is_array($_REQUEST['backend_data']))
 170    {
 171      foreach($_REQUEST['backend_data'] as $k => $v)
 172      {
 173        $v =  ini_get('magic_quotes_gpc') ? stripslashes($v) : $v;
 174        $qs[] = "backend_data[" . rawurlencode($k) . "]=" . rawurlencode($v);
 175      }
 176    }
 177
 178    $qs[] = session_name() . '=' . session_id();
 179    return implode('&', $qs);
 180   }
 181
 182
 183   /** Just space-tab indent some text */
 184   function xinha_tabify($text, $tabs)
 185   {
 186     if($text)
 187     {
 188       return str_repeat("  ", $tabs) . preg_replace('/\n(.)/', "\n" . str_repeat("  ", $tabs) . "\$1", $text);
 189     }
 190   }
 191
 192   /** Return upload_max_filesize value from php.ini in kilobytes (function adapted from php.net)**/
 193   function upload_max_filesize_kb()
 194   {
 195     $val = ini_get('upload_max_filesize');
 196     $val = trim($val);
 197     $last = strtolower($val{strlen($val)-1});
 198     switch($last)
 199     {
 200       // The 'G' modifier is available since PHP 5.1.0
 201       case 'g':
 202         $val *= 1024;
 203       case 'm':
 204         $val *= 1024;
 205    }
 206    return $val;
 207 }
 208 ?>