International PHP Conference Berlin 2023

openssl_cipher_key_length

(PHP 8 >= 8.2.0)

openssl_cipher_key_lengthGets the cipher key length

Descrição

openssl_cipher_key_length(string $cipher_algo): int|false

Gets the cipher key length.

Parâmetros

cipher_algo

The cipher method, see openssl_get_cipher_methods() for a list of potential values.

Valor Retornado

Returns the cipher length on success, ou false em caso de falha.

Erros

Emits an E_WARNING level error when the cipher algorithm is unknown.

Exemplos

Exemplo #1 openssl_cipher_key_length() example

<?php
$method 
'AES-128-CBC';

var_dump(openssl_cipher_key_length($method));
?>

O exemplo acima irá imprimir algo similar à:

int(16)
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