mcrypt_cfb() – Encrypting and Decrypting Data Using CFB Mode in PHP
This article explains the PHP mcrypt_cfb() function, detailing its signature, parameters—including cipher, key, data, mode, and IV—its compatibility with different libmcrypt versions, and the permissible mode constants for encrypting or decrypting data in CFB mode.
mcrypt_cfb() – Encrypting and Decrypting Data Using CFB Mode in PHP
string mcrypt_cfb ( int $cipher, string $key, string $data, int $mode, string $iv )
The first prototype targets libmcrypt 2.2.x, while the second targets libmcrypt 2.4.x and later versions. The $mode argument can be either MCRYPT_ENCRYPT or MCRYPT_DECRYPT .
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