How to send 2 GET with input

Question

EXAMPLE:

<form action="/" method="get">
<input class="form-control mr-md-4" type="search" placeholder="Digite aqui oque deseja..." aria-label="Search" name="s" id="search" value="<?php the_search_query(); ?>">
<button type="submit"><i class="fas fa-search fa-1x" style="color: #3498db;"></i></button>
</form>

IT SENDS THE URL LIKE THIS: site.com/? s=SEARCH TERM

BUT I WANT TO LEAVE IT AT THAT: site.com/? s=SEARCH TERM & ref=app

WITH THE &ref=app at the end of the URL

Answer 1

Put the ref=app in the attribute action of the form: For example:

action="pagina.php?ref=app"

Or you can also put this value in a input hidden, thus:

<input type="hidden" name="ref" value="app" />