mcrypt_get_cipher_name Get the name of the specified cipher stringmcrypt_get_cipher_name intcipher stringmcrypt_get_cipher_name stringcipher mcrypt_get_cipher_name is used to get the name of the specified cipher. mcrypt_get_cipher_name takes the cipher number as an argument (libmcrypt 2.2.x) or takes the cipher name as an argument (libmcrypt 2.4.x or higher) and returns the name of the cipher or &false;, if the cipher does not exist. ]]> The above example will produce: