(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


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


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.



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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