<?php
$methods = [
'AES-128-CBC',
'AES-128-ECB'
];
foreach ($methods as $method) {
var_dump(openssl_cipher_iv_length
($method)); }
PD9waHAKCiRtZXRob2RzID0gWwoJJ0FFUy0xMjgtQ0JDJywKCSdBRVMtMTI4LUVDQicKXTsKCmZvcmVhY2ggKCRtZXRob2RzIGFzICRtZXRob2QpIHsKCXZhcl9kdW1wKG9wZW5zc2xfY2lwaGVyX2l2X2xlbmd0aCgkbWV0aG9kKSk7Cn0=