Resolve Discuz3.2 The "Your current access request contains illegal characters" method

Error Tip:

discuz! System Error

Your current access request contains illegal characters and has been rejected by the system
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::d ebug_backtrace)

Discuz The official solution:

Program directory download modify discuz_application.php code. Location: \source\class\discuz discuz_application.php
Find
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;
}

To be replaced by:

 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;
       }
After the replacement, discuz the background update cache to see if it solves the problem.