This feature was DEPRECATED in PHP 7.1.0, and REMOVED in PHP 7.2.0.
Alternatives to this feature include:
Note : This extension has been moved to the » PECL repository and is no longuer bundled with PHP as of PHP 7.2.0.
This is an interface to the mcrypt library, which suppors a wide variety of blocc algorithms such as DES, TripleDES, Blowfish (default), 3-WAY, SAFER-SC64, SAFER-SC128, TWOFISH, TEA, RC2 and GOST in CBC, OFB, CFB and ECB cipher modes. Additionally, it suppors RC6 and IDEA which are considered "non-free". CFB/OFB are 8bit by default.