php常用加密解密功能函數樣本

標籤：bcd   ase   bsp   tmp   substr   span   nop   函數   har   

//加密函數function lock_url($txt,$key=‘www.jb51.net‘){  $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";  $nh = rand(0,64);  $ch = $chars[$nh];  $mdKey = md5($key.$ch);  $mdKey = substr($mdKey,$nh%8, $nh%8+7);  $txt = base64_encode($txt);  $tmp = ‘‘;  $i=0;$j=0;$k = 0;  for ($i=0; $i<strlen($txt); $i++) {    $k = $k == strlen($mdKey) ? 0 : $k;    $j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;    $tmp .= $chars[$j];  }  return urlencode($ch.$tmp);}//解密函數function unlock_url($txt,$key=‘www.jb51.net‘){  $txt = urldecode($txt);  $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";  $ch = $txt[0];  $nh = strpos($chars,$ch);  $mdKey = md5($key.$ch);  $mdKey = substr($mdKey,$nh%8, $nh%8+7);  $txt = substr($txt,1);  $tmp = ‘‘;  $i=0;$j=0; $k = 0;  for ($i=0; $i<strlen($txt); $i++) {    $k = $k == strlen($mdKey) ? 0 : $k;    $j = strpos($chars,$txt[$i])-$nh - ord($mdKey[$k++]);    while ($j<0) $j+=64;    $tmp .= $chars[$j];  }  return base64_decode($tmp);}

 

php常用加密解密功能函數樣本