本文实例讲述了PHP实现的DES加密解密实例。分享给大家供大家参考，具体如下：
<?php
$key = 'very important data';
function jiami($key, $str)
{
/* Open module, and create IV */
$td = mcrypt_module_open('des', '', 'ecb', '');
//$td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
//$td = mcrypt_module_open('des', '', 'cbc', '');
$key = substr($key, ...