(PHP 4 >= 4.0.2, PHP 5)
mcrypt_module_is_block_mode -- Returns if the specified mode outputs blocks or not
This function returns TRUE if the mode outputs blocks of bytes or
FALSE if it outputs just bytes. (e.g. TRUE for cbc and ecb, and
FALSE for cfb and stream). The optional lib_dir
parameter can contain the location where the mode module is on the
system.