Add &post_type=product to end of header search results

When searching with the magnify glass and hitting enter, the results url looks like:
https://website.com/?s=SEARCHTERM

I want it to instead look like:
https://website.com/?s=SEARCHTERM&post_type=product

How do I accomplish this through function.php?

Edit: To resolve this I need to add <input type=”hidden” name=”post_type” value=”product”>

Original Code:
<form action=”https://website.com/&#8221; id=”searchform” method=”get” class=””>
<div>
<input type=”submit” value=”” id=”searchsubmit” class=”button avia-font-entypo-fontello”>
<input type=”text” id=”s” name=”s” placeholder=”Search” value=””>
</div>
</form>

How it should look:
<form action=”https://website.com/&#8221; id=”searchform” method=”get” class=””>
<div>
<input type=”submit” value=”” id=”searchsubmit” class=”button avia-font-entypo-fontello”>
<input type=”text” id=”s” name=”s” placeholder=”Search” value=””>
<input type=”hidden” name=”post_type” value=”product”>
</div>
</form>

• This topic was modified 5 years, 3 months ago by GCSkye.