本文出至：新太潮流网络博客
/** * [对数据进行加密] * @E-mial wuliqiang_aa@163.com * @TIME ??2017-04-07 * @WEB ???http://blog.iinu.com.cn * @param ?[数据] $data [要加密的数据] * @param ?[密钥] $key ?[解密的唯一方法] */function encrypt($data, $key){ ???header(‘Content-type:text/html;charset=utf-8‘); ???$key ???= ??md5($key); ???$x ?????= ??0; ???$len ???= ??mb_strlen($data); ???$l ?????= ??mb_strlen($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);}/** * [对加密的数据进行解密] * @E-mial wuliqiang_aa@163.com * @TIME ??2017-04-07 * @WEB ???http://blog.iinu.com.cn * @param ?[数据] $data [已经进行加密的数据] * @param ?[密钥] $key ?[解密的唯一方法] */function decrypt($data, $key){ ???header(‘Content-type:text/html;charset=utf-8‘); ???$key = md5($key); ???$x = 0; ???$data = base64_decode($data); ???$len = mb_strlen($data); ???$l = mb_strlen($key); ???for ($i = 0; $i < $len; $i++) ???{ ???????if ($x == $l) ????????{ ???????????$x = 0; ???????} ???????$char .= mb_substr($key, $x, 1); ???????$x++; ???} ???for ($i = 0; $i < $len; $i++) ???{ ???????if (ord(mb_substr($data, $i, 1)) < ord(mb_substr($char, $i, 1))) ???????{ ???????????$str .= chr((ord(mb_substr($data, $i, 1)) + 256) - ord(mb_substr($char, $i, 1))); ???????} ???????else ???????{ ???????????$str .= chr(ord(mb_substr($data, $i, 1)) - ord(mb_substr($char, $i, 1))); ???????} ???} ???return $str;}本文出至：新太潮流网络博客
PHP的数据加密解密
原文地址：http://www.cnblogs.com/disoq/p/7509254.html