Mcrypt 함수 목록
PHP Manual

mcrypt_enc_get_iv_size

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_enc_get_iv_sizeReturns the size of the IV of the opened algorithm

설명

int mcrypt_enc_get_iv_size ( resource $td )

This function returns the size of the IV of the algorithm specified by the encryption descriptor in bytes. An IV is used in cbc, cfb and ofb modes, and in some algorithms in stream mode.

인수

td

The encryption descriptor.

반환값

Returns the size of the IV, or 0 if the IV is ignored in the algorithm.


Mcrypt 함수 목록
PHP Manual