PHP mcrypt_cbc function

mcrypt_cbc

(PHP 3 >= 3.0.8, PHP 4, PHP 5)

mcrypt_cbc — Encrypt/decrypt data in CBC modeDescriptionstring mcrypt_cbc ( int cipher, string key, string data, int mode [, string iv] )

string mcrypt_cbc ( string cipher, string key, string data, int mode [, string iv] )

The first prototype is when linked against libmcrypt 2.2.x, the
second when linked against libmcrypt 2.4.x or higher. The
mode should be either
MCRYPT_ENCRYPT or
MCRYPT_DECRYPT.

This function should not be used anymore, see
mcrypt_generic() and
mdecrypt_generic() for replacements.