三个php加密解密算法

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已于 2022-10-25 18:51:12 修改 · 885 阅读

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#php #算法 #java

于 2017-07-03 15:51:34 首次发布

三个功能强大的php加密解密函数

  1 //加密函数
  2 function lock_url($txt,$key='www.fyunw.com')
  3 {
  4     $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
  5     $nh = rand(0,64);
  6     $ch = $chars[$nh];
  7     $mdKey = md5($key.$ch);
  8     $mdKey = substr($mdKey,$nh%8, $nh%8+7);
  9     $txt = base64_encode($txt);
 10     $tmp = '';
 11     $i=0;$j=0;$k = 0;
 12     for ($i=0; $i<strlen($txt); $i++) {
 13         $k = $k == strlen($mdKey) ? 0 : $k;
 14         $j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;
 15         $tmp .= $chars[$j];
 16     }
 17     return urlencode($ch.$tmp);
 18 }
 19 //解密函数
 20 function unlock_url($txt,$key='www.fyunw.com')
 21 {
 22     $txt = urldecode($txt);
 23     $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
 24     $ch = $txt[0];
 25     $nh = strpos(