mcrypt_module_is_block_mode

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_module_is_block_mode — Returns if the specified mode outputs blocks or not

说明

bool mcrypt_module_is_block_mode ( string $mode [, string $lib_dir ] )

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).

参数

mode: One of the MCRYPT_MODE_modename constants, or one of the following strings: "ecb", "cbc", "cfb", "ofb", "nofb" or "stream".
lib_dir: The optional lib_dir parameter can contain the location where the algorithm module is on the system.

返回值

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).