1 // 异位加密或者解密
 2 function encrytion($value, $type=0){
 3     $key = md5(C(‘AUTO_LOGIN_KEY‘));
 4 
 5     if ($type) {
 6         // 异位加密
 7         return str_replace(‘=‘, ‘‘, base64_encode($value ^ $key));
 8     }
 9 
10     $value = base64_decode($value);
11     return $value ^ $key; 
12 }