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：
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<?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 = '服务器之家www.zzvips.com'; // 被加密信息$data=iconv("gbk","utf-8",$data);$key = 'www.zzvips.com'; // 密钥$encrypt = encrypt($data, $key);$decrypt = decrypt($encrypt, $key);echo $encrypt, "<br/>", $decrypt;?> |
运行结果如下：
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TrXMTM8SFB3DGhTr2qeuYqOXZmpmn8mo服务器之家www.zzvips.com |
希望本文所述对大家PHP程序设计有所帮助。
