/**
  * Looks for class names in a PHP code
  *
  * @param string File to scan for class name.
  * @todo Reine PHP Alternative um Klassen zu erkennen (RegExp)
  */
 private function parse($filepath)
 {
     $file = new File($filepath);
     if ($file->exists() == true) {
         $code = $file->read();
         $tokens = @token_get_all($code);
         foreach ($tokens as $token) {
             if (!isset($token[0])) {
                 continue;
             }
             // next token after this one is our desired class name
             if ($token[0] == T_CLASS) {
                 $this->next = true;
             }
             if ($token[0] == T_STRING && $this->next === true) {
                 if (isset($this->data[$token[1]]) == true) {
                     Core::throwError('Class with name "' . $token[1] . '" was found more than once. Only file "' . $file->absPath() . '" has been indexed!', INTERNAL_NOTICE);
                 }
                 $this->data[$token[1]] = $file->relPath();
                 $this->next = false;
             }
         }
     }
 }