How to make PhpStorm understand named groups in regular expressions?

Question

Regular Expressions

PhpStorm says "This named group syntax is not supported in this regex dialect" but they actually work in PHP and have always worked. Where in the settings to report this to PhpStorm?
Here is a link to the place in the JetBrains code that generates this error: https://github.com/JetBrains/intellij-community/bl...
To make it clearer what I mean, here is a code example:

<?php

$stringUrl = 'https://sitename.org:80/full/path/?param1=1#anchor';
$stringRegexp = <<<'REGEXP'
#^((?<protocol>(https|http)):)?//(?<domain>[^/?\#:]+)(:(?<port>[\d]+))?(?<path>[^?\#]*)?(\?(?<params>[^\#]*))?(\#(?<anchor>.*))?$#usi
REGEXP;

if(preg_match($stringRegexp, $stringUrl, $arrayMatches)){
  print_r($arrayMatches);
}
/*
Array
(
    [0] => https://sitename.org:80/full/path/?param1=1#anchor
    [1] => https:
    [protocol] => https
    [2] => https
    [3] => https
    [domain] => sitename.org
    [4] => sitename.org
    [5] => :80
    [port] => 80
    [6] => 80
    [path] => /full/path/
    [7] => /full/path/
    [8] => ?param1=1
    [params] => param1=1
    [9] => param1=1
    [10] => #anchor
    [anchor] => anchor
    [11] => anchor
)
*/

Here is another screenshot from the studio (version 2017.2 at home, but at work, the latest version has the same errors)