(PHP 4, PHP 5)
mcrypt_get_cipher_name — Gets the name of the specified cipher
$cipher
   )$cipher
   )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.
  
cipher
     One of the MCRYPT_ciphername constants or the name of the algorithm as string.
   This function returns the name of the cipher or FALSE, if the cipher does
   not exist.
  
Example #1 mcrypt_get_cipher_name() Example
<?php
   $cipher = MCRYPT_TripleDES;
   echo mcrypt_get_cipher_name($cipher);
?>
以上例程会输出:
3DES