Description:
------------
Hey there,
I wrote a validation script using filter_var($url, FILTER_VALIDATE_URL) and some tests for the script.
Now I've discovered a mistake while validating an url with a slash in the query string.
Is there a pathname like in https://test.com/?q=123/456 or https://test.com/x/y/z?q=123/456 the url is valid. 
Is there no pathname like in https://test.com?q=123/456 the url is not valid.
Could it be, that there is a bug in the regex?



Test script:
---------------
<?php
var_dump(filter_var("https://test.com/?q=123456", FILTER_VALIDATE_URL));
var_dump(filter_var("https://test.com?q=123456", FILTER_VALIDATE_URL));
var_dump(filter_var("https://test.com/?q=123/456", FILTER_VALIDATE_URL));
var_dump(filter_var("https://test.com?q=123/456", FILTER_VALIDATE_URL));

Expected result:
----------------
string 'https://test.com/?q=123456' (length=26)
string 'https://test.com?q=123456' (length=25)
string 'https://test.com/?q=123/456' (length=27)
string 'https://test.com?q=123/456' (length=26)

Actual result:
--------------
string 'https://test.com/?q=123456' (length=26)
string 'https://test.com?q=123456' (length=25)
string 'https://test.com/?q=123/456' (length=27)
boolean false