(PHP 4, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_get_block_size — Gets the block size of the specified cipher
Esta función ha sido declarada OBSOLETA a partir de PHP 7.1.0 y será ELIMINADA a partir de PHP 7.2.0. Su uso está totalmente desaconsejado.
The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x or 2.5.x.
mcrypt_get_block_size() is used to get the
size of a block of the specified cipher (in
combination with an encryption mode).
It is more useful to use the mcrypt_enc_get_block_size() function as this uses the resource returned by mcrypt_module_open().
cipherUna de las constantes MCRYPT_nombredelcifrado, o el nombre del algoritmo como string.
modeUna de las constantes MCRYPT_MODE_nombredelmodo, o una de las siguientes strings: "ecb", "cbc", "cfb", "ofb", "nofb" o "stream".
Returns the algorithm block size in bytes o false en caso de error.
Ejemplo #1 mcrypt_get_block_size() example
This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x.
<?php
echo mcrypt_get_block_size('tripledes', 'ecb'); // 8
?>