iaPatchApplier::_checkTokenValidity PHP Method

    private function _checkTokenValidity($content, $validToken)
    {
        $signatureFound = false;
        $factor = 0;
        foreach ($this->_signatures as $factor => $signatures) {
            foreach ($signatures as $signature) {
                if (false !== strpos($content, $signature)) {
                    $signatureFound = true;
                    break 2;
                }
            }
        }
        $calculatedToken = md5($signatureFound ? substr($content, $factor) : $content);
        return $calculatedToken == $validToken;
    }