解决Discuz3.2 出现“您当前的访问请求当中含有非法字符“方法

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: 0022]search.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: 0023]source/function/function_core.php(discuz_error::system_error)
[Line: 0024]source/class/discuz/discuz_error.php(discuz_error::debug_backtrace)

Discuz官方给出的解决方法：

程序目录下载修改discuz_application.php代码。位置：sourceclassdiscuz的discuz_application.php
查找
private function _xss_check() {

                static $check = array('"', '>', '<', ''', '(', ')', 'CONTENT-TRANSFER-ENCODING');

                if(isset($_GET['formhash']) && $_GET['formhash'] !== formhash()) {
                        system_error('request_tainting');
                }

                if($_SERVER['REQUEST_METHOD'] == 'GET' ) {
                        $temp = $_SERVER['REQUEST_URI'];
                } elseif(empty ($_GET['formhash'])) {
                        $temp = $_SERVER['REQUEST_URI'].file_get_contents('php://input');
                } else {
                        $temp = '';
                }

                if(!empty($temp)) {
                        $temp = strtoupper(urldecode(urldecode($temp)));
                        foreach ($check as $str) {
                                if(strpos($temp, $str) !== false) {
                                        system_error('request_tainting');
                                }
                        }
                }

                return true;
        }

替换为：

 private function _xss_check() {
                $temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
                if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
                        system_error('request_tainting');
                }
                return true;
        }
替换后，discuz后台更新缓存，看看能解决问题么。