WordPress: Customize CPT Search Results

cpt-search-results

/*
 * For use when you have a custom page to display a custom post type but also need the CPT pulled into search results.
 *
 * Includes functions hooked to filters to alter the title, permalink, and excerpt.
 * Uses switch statements for easily extending to additional custom post types.
 *
 */
 
<?php
/**
 * ADD POST TYPES TO SEARCH RESULTS 
 */
function cpt_search_filter($query) {
	if ( !is_admin() && $query->is_main_query() ) {
		if ($query->is_search) {
			$query->set('post_type', array( 'page', 'post', 'cpt' ) );
		}
	}
}
add_action('pre_get_posts', 'cpt_search_filter');

/**
 * CHANGE SEARCH RESULT URL FOR CPTS TO LINK TO "PARENT"
 */
function cpt_search_permalinks($url) {
	if(is_search()) {
		$postid = url_to_postid( $url );
		$post_type = get_post_type($postid);
		$slug = get_post( $postid )->post_name;
		switch ($post_type) {
			case 'cpt':
				return home_url('/parent/#'.$slug);
				break;
			default:
				return $url;
		}
	} else {
		return $url;
	}
}
add_filter('the_permalink', 'cpt_search_permalinks');

/**
 * PREPEND CPT SEARCH RESULT TITLE WITH "PARENT" PAGE
 */
function cpt_search_title($title, $postid) {
	if(is_search()) {
		$post_type = get_post_type($postid);
		switch ($post_type) {
			case 'cpt':
				return 'Parent Title: '.$title;
				break;
			default:
				return $title;
		}
	} else {
		return $title;
	}
}
add_filter('the_title', 'cpt_search_title', 10, 2);

/**
 * UPDATE SEARCH RESULT FOR CPT TO USE CUSTOM FIELD VALUES
 */
function cpt_search_excerpt($excerpt) {
	global $post;
	$post_type = $post->post_type;
	if(is_search()) {
		switch ($post_type) {
			case 'cpt':
				$cpt_meta = get_post_meta($post->ID, 'cpt_meta', true);
				return $cpt_meta;
				break;
			default:
				return $excerpt;
		}
	} else {
		return $excerpt;
	}
}
add_filter('get_the_excerpt', 'cpt_search_excerpt');