PHP は mcrypt を使用して暗号化および復号化機能を実行します

function mc_encrypt($encrypt, $mc_key) {
 $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
 $passcrypt = (MCRYPT_RIJNDAEL_256, $ mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
 $encode =base64_encode($passcrypt);
 return $encode;
}

// 復号化関数
function mc_decrypt($decrypt, $mc_key) {
 $decoded =base64_decode($decrypt);
 $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
 $decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($decoded), B、$iv)) ;
 return $decrypted;
}
?>