mcrypt_enc_get_iv_size
(PHP 4 >= 4.0.2, PHP 5)
mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm
說明
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.
參數
-
td -
The encryption descriptor.
回傳值
Returns the size of the IV, or 0 if the IV is ignored by the algorithm.
add a note
User Contributed Notes
There are no user contributed notes for this page.
