How to combine 2 get requests?

Question

PHP

Hello.
Site on bitrix.
There are two menus: grouping and sorting, you can select one first, then the other.
In the link menu, like:
?sorter=name (by name) ?
groupper=brand (by manufacturer
)
name&groupper=brand.
Thanks in advance for your reply.

Answer 1

Add your parameters to the array, combine with the common GET and form the address.

<a href="/?<?=http_build_query(array_merge($_GET, array("sorter" => "name")));?>">
    Сортировка по наименованию
</a>