PHPSecureSession\SecureHandler::hash_equals PHP Method

    protected function hash_equals($expected, $actual)
    {
        $expected = (string) $expected;
        $actual = (string) $actual;
        if (function_exists('hash_equals')) {
            return hash_equals($expected, $actual);
        }
        $lenExpected = mb_strlen($expected, '8bit');
        $lenActual = mb_strlen($actual, '8bit');
        $len = min($lenExpected, $lenActual);
        $result = 0;
        for ($i = 0; $i < $len; $i++) {
            $result |= ord($expected[$i]) ^ ord($actual[$i]);
        }
        $result |= $lenExpected ^ $lenActual;
        return $result === 0;
    }