(PHP 8 >= 8.2.0)
openssl_cipher_key_length — Gets the cipher key length
$cipher_algo): int|falseGets the cipher key length.
cipher_algoThe cipher method, see openssl_get_cipher_methods() for a list of potential values.
Returns the cipher length on success, ou false si une erreur survient.
Emits an E_WARNING level error when the cipher algorithm
is unknown.
Exemple #1 openssl_cipher_key_length() example
<?php
$method = 'AES-128-CBC';
var_dump(openssl_cipher_key_length($method));
?>
Résultat de l'exemple ci-dessus est similaire à :
int(16)