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

Aviso

This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

Descrição

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.

Parâmetros

td: The encryption descriptor.

Valor Retornado

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