mcrypt_enc_is_block_algorithm
(PHP 4 >= 4.0.2, PHP 5)
mcrypt_enc_is_block_algorithm — Checks whether the algorithm of the opened mode is a block algorithm
Description
      bool mcrypt_enc_is_block_algorithm
       ( resource $td
      )
    This function returns TRUE if the algorithm is a block algorithm, or FALSE if it is a stream algorithm.