mcrypt_get_block_size
(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
This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.
Description
$cipher): int|false$cipher, string $mode): int|falseThe 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().
Parameters
-
cipher -
One of the
MCRYPT_ciphernameconstants, or the name of the algorithm as string. -
mode -
One of the
MCRYPT_MODE_modenameconstants, or one of the following strings: "ecb", "cbc", "cfb", "ofb", "nofb" or "stream".
Return Values
Returns the algorithm block size in bytes or false on failure.
Examples
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.
<?php
echo mcrypt_get_block_size('tripledes', 'ecb'); // 8
?>
See Also
- mcrypt_get_key_size() - Gets the key size of the specified cipher
- mcrypt_enc_get_block_size() - Returns the blocksize of the opened algorithm
- mcrypt_encrypt() - Encrypts plaintext with given parameters
