ManaPHP\Security\Crypt::encrypt PHP Метод

    public function encrypt($text, $key = null)
    {
        if ($key === null) {
            $key = $this->_key;
        }
        $ivSize = mcrypt_enc_get_block_size($this->_mcrypt);
        $encryptKey = md5($key, true);
        $iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
        mcrypt_generic_init($this->_mcrypt, $encryptKey, $iv);
        return $iv . mcrypt_generic($this->_mcrypt, pack('N', strlen($text) + 16) . $text . md5($text, true));
    }