The below can be used for encrypting something that needs to be decrypted again. It can be used for implementing a simple “remember login” also. The first parameter of mcrypt_encrypt or mcrypt_decrypt is “One of the MCRYPT_ciphername constants, or the name of the algorithm as string.” Details can be found here http://php.net/manual/en/mcrypt.ciphers.php Change it as per… Continue reading PHP Encrypt and Decrypt