mcrypt_module_close	mcrypt_module_get_algo_key_size

Mcrypt Functions	Last updated: Mon, 26 Oct 2026

mcrypt_module_get_algo_block_size

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_module_get_algo_block_size — Returns the blocksize of the specified algorithm

Warning

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.

function mcrypt_module_get_algo_block_size(string $algorithm, string $lib_dir = ?): int

Gets the blocksize of the specified algorithm.

algorithm: The algorithm name.
lib_dir: This optional parameter can contain the location where the mode module is on the system.

Returns the block size of the algorithm specified in bytes.

mcrypt_module_close	mcrypt_module_get_algo_key_size

Mcrypt Functions	Last updated: Mon, 26 Oct 2026