How to put two values into a select HTML form?

It’s easy but you need php to process it. You will use explode from PHP.

Let’s say this is your select form.

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<select name="categ">
<option value="value1-value2">value1-value2</option>
</select>

You can process it in a php file with:

<?php
 
$post = $_POST['categ'];
 
$categ_explode = explode("-", $post);
 
echo ''.$categ_explode[0].', '.$categ_explode[1].'';
 
?>