PHP mcrypt_cfb function

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mcrypt_cfb

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

mcrypt_cfb — Encrypt/decrypt data in CFB modeDescriptionstring mcrypt_cfb ( int cipher, string key, string data, int mode, string iv )

string mcrypt_cfb ( 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.