PHP 忒聊 綴豖 ヶ輛 mcrypt_enc_get_iv_size (PHP 4 = 4.0.2) Description This function returns the size of the iv of the algorithm specified by the encryption descriptor in bytes. If it returns '0' then the IV is ignored in the algorithm. An IV is used in cbc, cfb and ofb modes, and in some algorithms in stream mode. 綴豖 れ萸 ヶ輛 mcrypt_enc_get_block_size 奻珨撰 mcrypt_enc_get_key_size