PHP 忒聊 綴豖 ヶ輛 mcrypt_get_iv_size (PHP 4 = 4.0.2) Description The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x or higher. mcrypt_get_iv_size() returns the size of the Initialisation Vector (IV) in bytes. On error the function returns FALSE. If the IV is ignored in the specified cipher/mode combination zero is returned. cipher is one of the MCRYPT_ciphername constants of the name of the algorithm as string. mode is one of the MCRYPT_MODE_modename constants of one of "ecb", "cbc", "cfb", "ofb", "nofb" or "stream". td is the resource that is returned by mcrypt_module_open(). 瞰赽 1. mcrypt_create_iv() example ?php $size = mcrypt_get_iv_size (MCRYPT_CAST_256, MCRYPT_MODE_CFB); $size = mcrypt_get_iv_size ('des', 'ecb');? See also: mcrypt_create_iv() 綴豖 れ萸 ヶ輛 mcrypt_get_cipher_name 奻珨撰 mcrypt_get_key_size