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mcrypt_enc_get_iv_size

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm

Увага

Ця функція ЗАСТАРІЛА, починаючи з PHP 7.1.0, та ВИЛУЧЕНА в PHP 7.2.0. Вкрай не рекомендується на неї покладатися.

Опис

mcrypt_enc_get_iv_size(resource $td): int

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.

Параметри

td

The encryption descriptor.

Значення, що повертаються

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