php结合md5的加密解密算法实例

本文实例讲述了php结合md5的加密解密算法。分享给大家供大家参考，具体如下：

<?php /* * Created on 2016-9-30 * */ function encrypt($data, $key) { $key = md5($key); $x = 0; $len = strlen($data); $l = strlen($key); for ($i = 0; $i < $len; $i++) { if ($x == $l) { $x = 0; } $char .= $key{$x}; $x++; } for ($i = 0; $i < $len; $i++) { $str .= chr(ord($data{$i}) + (ord($char{$i})) % 256); } return base64_encode($str); } function decrypt($data, $key) { $key = md5($key); $x = 0; $data = base64_decode($data); $len = strlen($data); $l = strlen($key); for ($i = 0; $i < $len; $i++) { if ($x == $l) { $x = 0; } $char .= substr($key, $x, 1); $x++; } for ($i = 0; $i < $len; $i++) { if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1))) { $str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1))); } else { $str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1))); } } return $str; } $data = 'www.haoshilao.net'; // 被加密信息 $data=iconv("gbk","utf-8",$data); $key = 'www.haoshilao.net'; // 密钥 $encrypt = encrypt($data, $key); $decrypt = decrypt($encrypt, $key); echo $encrypt, "<br/>", $decrypt; ?>

运行结果如下：

TrXMTM8SFB3DGhTr2qeuYqOXZmpmn8mo www.haoshilao.net

《php结合md5的加密解密算法实例》阅读地址：http://www.haoshilao.net/11951/