# mcrypt_ofb

(PHP 4, PHP 5)

mcrypt_ofb — Encrypt/decrypt data in OFB mode

### Description

string mcrypt_ofb ( int `$cipher` , string `$key` , string `$data` , int `$mode` , string `$iv` )
string mcrypt_ofb ( string `$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.