PHP 5.4.31 Released


(PHP 4, PHP 5)

mcrypt_get_block_sizeGets the block size of the specified cipher


int mcrypt_get_block_size ( int $cipher )
int mcrypt_get_block_size ( string $cipher , string $mode )

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().

Elenco dei parametri


Una tra le costanti MCRYPT_ciphername, oppure il nome dell'algoritmo sotto forma di stringa.


Una tra le costanti MCRYPT_MODE_modename, oppure una tra le seguenti stringhe: "ecb", "cbc", "cfb", "ofb", "nofb" o "stream".

Valori restituiti

Gets the block size, as an integer.


Example #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.


echo mcrypt_get_block_size('tripledes''ecb'); // 8


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