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mcrypt_get_block_size
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mcrypt_get_block_size

(PHP 3 >= 3.0.8, PHP 4, PHP 5)

mcrypt_get_block_size -- Get the block size of the specified cipher

Description

int mcrypt_get_block_size ( int cipher )

int mcrypt_get_block_size ( string cipher, string module )

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().

This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x.

Example 1. mcrypt_get_block_size() example

<?php
    echo mcrypt_get_block_size('tripledes', 'ecb');
?>

Prints:
8

See also: mcrypt_get_key_size(), mcrypt_enc_get_block_size() and mcrypt_encrypt().

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