TeamSpeak3/Helper/Uri.php
public function hasQueryVar($key)
    {
        if (!$this->hasQuery()) {
            return false;
        }

        parse_str($this->query, $queryArray);

        return array_key_exists($key, $queryArray) ? true : false;
    }
public function hasQueryVar($key)
    {
        if (!$this->hasQuery()) {
            return false;
        }

        parse_str($this->query, $queryArray);

        return array_key_exists($key, $queryArray) ? true : false;
    }
Returns TRUE if the URI has a query variable.

@param $key
@return boolean