(PHP 4 >= 4.0.2, PHP 5, PHP 7)
mcrypt_module_is_block_algorithm — This function checks whether the specified algorithm is a block algorithm
$algorithm
[, string $lib_dir
] )
This function returns TRUE if the specified algorithm is a block
algorithm, or FALSE if it is a stream one.
algorithmThe algorithm to check.
lib_dir
The optional lib_dir parameter can contain the
location where the algorithm module is on the system.
This function returns TRUE if the specified algorithm is a block
algorithm, or FALSE if it is a stream one.