您当前的访问请求当中含有非法字符，已经被系统拒绝

登录DZ X3.1论坛，然后退出账号时，出现如下错误提示：

Discuz! System Error
您当前的访问请求当中含有非法字符，已经被系统拒绝

PHP Debug

[Line: 0026]member.php(discuz_application->init) [Line: 0071]source\class\discuz\discuz_application.php(discuz_application->_init_misc) [Line: 0552]source\class\discuz\discuz_application.php(discuz_application->_xss_check) [Line: 0355]source\class\discuz\discuz_application.php(system_error) [Line: 0017]source\function\function_core.php(discuz_error::system_error) [Line: 0024]source\class\discuz\discuz_error.php(discuz_error::debug_backtrace)

出错的网址为：
http://www.xxx.com/member.php?mod=clearcookies&formhash=0ff91285&referer

非官方解决办法：
FTP 进入网站根目录 找到 \source\class\discuz的discuz_application.php 编辑
查找

1. private function _xss_check() {
   
2. 
   
3. static $check = array('"', '>', '<', '\'', '(', ')', 'CONTENT-TRANSFER-ENCODING');
   
4. 
   
5. if(isset($_GET['formhash']) && $_GET['formhash'] !== formhash()) {
   
6. system_error('request_tainting');
   
7. }
   
8. 
   
9. if($_SERVER['REQUEST_METHOD'] == 'GET' ) {
   
10. $temp = $_SERVER['REQUEST_URI'];
    
11. } elseif(empty ($_GET['formhash'])) {
    
12. $temp = $_SERVER['REQUEST_URI'].file_get_contents('php://input');
    
13. } else {
    
14. $temp = '';
    
15. }
    
16. 
    
17. if(!empty($temp)) {
    
18. $temp = strtoupper(urldecode(urldecode($temp)));
    
19. foreach ($check as $str) {
    
20. if(strpos($temp, $str) !== false) {
    
21. system_error('request_tainting');
    
22. }
    
23. }
    
24. }
    
25. 
    
26. return true;
    
27. }

复制代码

替换为

1. private function _xss_check() {
   
2. $temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
   
3. if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
   
4. system_error('request_tainting');
   
5. }
   
6. return true;
   
7. }

复制代码

保存 OK