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Adding multiple hidden fields to filter wordpress search

Adding multiple hidden fields to filter wordpress search

Posted on 4th March, 2017 186 Comments

To add multiple fields you’ll first need to create a small funciton in your functions.php

/**
 * Custom Search Queries 
 * Allows the use of multiple hidden filters on search.php
 *************************************************************/
function SearchFilter($query) {
$post_type = $_GET['post_type'];
if (!$post_type) {
    $post_type = 'any';
}
if ($query->is_search) {
    $query->set('post_type', $post_type);
};
return $query;
}

Then in your searchform.php you can add hidden fields like this.

<form method="get" action="<?php bloginfo('url'); ?>/">
	<label for="s">Search the site: </label>
	<input type="text" id="s" name="s" value="<?php the_search_query(); ?>">

	<!-- Search only these custom post types -->
			<input type="hidden" name="post_type[]" value="page">
			<input type="hidden" name="post_type[]" value="services">
			<input type="hidden" name="post_type[]" value="solutions">
			<input type="hidden" name="post_type[]" value="resources">
			<input type="hidden" name="post_type[]" value="technology">
			<input type="hidden" name="post_type[]" value="about">
	<input type="submit" value="Search">
</form>

If you want to do this with any other filter, for example categories. Repeat the above and replace post_type with cat.

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