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_sizeReturns the size of the IV of the opened algorithm

Ostrzeżenie

Ta funkcja jest PRZESTARZAŁA od PHP 7.1.0. Używanie tej funkcji nie jest zalecane.

Opis

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.

Parametry

td

The encryption descriptor.

Zwracane wartości

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

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