while ($count < $length)
             {
             $cts.=chr(hexdec($ciphertext[$count] . $ciphertext[$count + 1]));
             $count+=2;
             }

     $length =strlen($cts);
     $count     =0;
     $mbcount=0;

     while ($count + 1 < $length)
             {
             $foo = ord($cts[$count + 1]) ^ ord($magic_buffer[$mbcount]); bitsCN.Com网管联盟

             if ($foo - ord($cts[$count]) < 0)
                 {
                 $plaintext.=chr($foo - ord($cts[$count]) + 255);
                 }
             else
                 {
                 $plaintext.=chr($foo - ord($cts[$count]));
                 }

             $count++;
             $mbcount++; bitsCN.nET中国网管博客

             if ($mbcount == 28)
                 {
                 $mbcount=0;
                 }
             } BBS.bitsCN.com国内最早的网管论坛

     return $plaintext;
     }