mcrypt_module_is_block_algorithm

PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0
mcrypt_module_is_block_algorithm - This function checks whether the specified algorithm is a block algorithm
Manual

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

This function returns true if the specified algorithm is a block algorithm, or false if it is a stream one.

Parameters

algorithm

The algorithm to check.

lib_dir

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

Return Values

This function returns true if the specified algorithm is a block algorithm, or false if it is a stream one.