InvalidArgumentException in url.class.php because FILTER_VALIDATE_URL can't handle non-Ascii characters

Hi,

I can see folowing errors in log

Uncaught Exception error: Uncaught exception 'InvalidArgumentException' with message 'Invalid URL: https://www.rogo.cz/users/details.php?search_surname=Majeský&search_username=&student_id=&moduleID=&module=2007&calendar_year=%&students=on&submit=Search&userID=20275&email=&tmp_surname=&tmp_courseID=&tmp_yearID=' in /var/www/rogo/classes/url.class.php:63 Stack trace: #3 {main} thrown in /var/www/rogo/classes/url.class.php on line 63

$_SERVER['QUERY_STRING'] search_surname=Majeský&search_username=&student_id=&moduleID=&module=2007&calendar_year=%&students=on&submit=Search&userID=20275&email=&tmp_surname=&tmp_courseID=&tmp_yearID=
$_POST
$_SERVER['PHP_SELF'] /users/details.php
$_SERVER['REQUEST_METHOD'] GET

Backtrace:
#0 /var/www/rogo/classes/url.class.php(94): Url->__construct('https://www.rog...') #1 /var/www/rogo/include/staff_auth.inc(41): Url::fromGlobals() #2 /var/www/rogo/users/details.php(30): require_once('/var/www/rogo/i...') #3 {main}
--------------------

I suppose it's because FILTER_VALIDATE_URL can't handle non-Ascii characters.

Steps to reproduce

Assumptions

• There is a user with a surname that contains a non-ASCII character (for example: Majeský)

Steps

1. Navigate to the user search page

2. Enter the surname of a user that includes a non-ASCII character and search for them

3. Double click the user to open their profile

Outcome

The page will generate an exception about the page url being invalid

Expected outcome

The page opens without error.

Notes

This error could also happen on any staff only page where the query string contains a non-ASCII character.