(PHP 4 >= 4.0.2, PHP 5) This function terminates encryption
(PHP 4, PHP 5, PHP 7) Creates an initialization vector (IV) from a random source
(PHP 4, PHP 5, PHP 7) Gets the block size of the specified cipher
(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the size of the IV of the opened algorithm
(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns if the specified module is a block algorithm or not
(PHP 4 >= 4.0.2, PHP 5, PHP 7) Decrypts data
(PHP 4 >= 4.0.2, PHP 5, PHP 7) Checks whether the encryption of the opened mode works on blocks
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