public function _getPrev(&$tokens, $key, $whatToGet)
{
$key--;
if (!is_array($whatToGet)) {
$whatToGet = array($whatToGet);
}
while (!is_array($tokens[$key]) || !in_array($tokens[$key][0], $whatToGet)) {
$key--;
if (!isset($tokens[$key])) {
return FALSE;
}
}
return $tokens[$key][1];
}