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mcrypt_enc_get_iv_size(PHP 4 >= 4.0.2, PHP 5) mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm Description int mcrypt_enc_get_iv_size ( resource $td ) 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. Parameters
Return ValuesReturns the size of the IV, or 0 if the IV is ignored in the algorithm. |