php7 AES IOS Android

$key = 'SK7381DNSU#&#@DS';  //key的長度保持16位 加粗 標識
$cipher = "AES-128-ECB";
$iv_len = openssl_cipher_iv_length($cipher);
$iv = openssl_random_pseudo_bytes($iv_len);
$encrypt_data = openssl_encrypt(json_encode($response), $cipher, $key, $options = 0, $iv, $tag); //加密後自帶base64_encode 切勿重複encode