For anyone trying to achieve something similar, here's how I solved it:
In searchform.php, duplicate the form, as such:
<form method="get" id="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">
<input type="text" name="s" id="s" placeholder="<?php esc_attr_e( 'Search by Post' ); ?>" />
<input type="hidden" name="search-type" value="posts" />
<button type="submit" name="submit" id="searchsubmit" value="<?php esc_attr_e( 'Search' ); ?>">
<img src="<?php bloginfo('template_url'); ?>/images/searchic.png" />
</button>
</form>
<form method="get" id="searchform2" action="<?php echo esc_url( home_url( '/' ) ); ?>">
<input type="text" name="s" id="s2" placeholder="<?php esc_attr_e( 'Search by Category' ); ?>" />
<input type="hidden" name="search-type" value="categories" />
<button type="submit" name="submit" id="searchsubmit2" value="<?php esc_attr_e( 'Search' ); ?>">
<img src="<?php bloginfo('template_url'); ?>/images/searchic.png" />
</button>
</form>
Then in search.php, below get_header()
, the following:
if(isset($_GET['search-type'])) {
$searchtype = $_GET['search-type'];
if($searchtype == 'posts') {
get_template_part( 'search', 'posts' );
} elseif($searchtype == 'categories') {
get_template_part( 'search', 'categories' );
}
}
Then make two files, "search-posts.php" and "search-categories.php" where you can define the loops of the respective search results.
Voilà!