Mcrypt Functions
PHP Manual


(PHP 4, PHP 5)

mcrypt_ofbEncrypts/decrypts data in OFB mode


This function was DEPRECATED in PHP 5.5.0, and REMOVED in PHP 7.0.0.

Alternatives to this function include:


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.

Mcrypt Functions
PHP Manual