This function checks whether the specified algorithm is a block algorithm

mcrypt_module_is_block_algorithm_mode
mcrypt_module_is_block_mode
Mcrypt Functions
PHP Manual

# mcrypt_module_is_block_algorithm

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_module_is_block_algorithm — This function checks whether the specified algorithm is a block algorithm

### Description

bool mcrypt_module_is_block_algorithm ( string `$algorithm` [, string `$lib_dir` ] )

This function returns `TRUE` if the specified algorithm is a block algorithm, or `FALSE` is it is a stream algorithm.

### Parameters

`algorithm`

  The algorithm to check.

`lib_dir`

  The optional `lib_dir` parameter can contain the location of where the algorithm module is on the system.

### Return Values

This function returns `TRUE` if the specified algorithm is a block algorithm, or `FALSE` is it is a stream algorithm.

mcrypt_module_is_block_algorithm_mode
mcrypt_module_is_block_mode
Mcrypt Functions
PHP Manual