WordPress search form & results for custom post type

search.php

<?php

// check to see if there is a post type in the URL
if ( isset( $_GET['post_type'] ) && $_GET['post_type'] ) {

	// save it for later
	$post_type = $_GET['post_type'];

	// check to see if a search template exists
	if ( locate_template( 'search-' . $post_type . '.php' ) ) {
		// load it and exit
		get_template_part( 'search', $post_type );
		exit;
	}

}

?>

<!-- default search results here -->

searchform-kb_article.php

<form class="search" action="<?php echo home_url( '/' ); ?>">
  <input type="search" name="s" placeholder="Search&hellip;">
  <input type="submit" value="Search">
  <input type="hidden" name="post_type" value="kb_article">
</form>

@galengidman, Thanks for the update. We can add the additional fields in add to cart form of product page by using the hooks available in the add to cart form. Also I am still checking the ways to solve this.

Thanks @galengidman, its work for me!

Hi, @galengidman. How can I add the search for categories or taxonomies to this form?