mcrypt_cbc Encrypts/decrypts data in CBC mode &warn.deprecated.function.5-5-0.removed.7-0-0.alternatives; mcrypt_decrypt mcrypt_encrypt &reftitle.description; stringmcrypt_cbc intcipher stringkey stringdata intmode stringiv stringmcrypt_cbc stringcipher stringkey stringdata intmode stringiv 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.