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.