Wordpress plugin that filters the Wordpress search results to show only posts, no other post types.

search-filter-only-posts.php

<?php
/**
 * The plugin bootstrap file
 *
 * This file is read by WordPress to generate the plugin information in the plugin
 * admin area. This file also includes all of the dependencies used by the plugin,
 * registers the activation and deactivation functions, and defines a function
 * that starts the plugin.
 *
 * @since             1.0.0
 * @package           search-filter-only-posts
 *
 * @wordpress-plugin
 * Plugin Name:       Search Filter - Only Posts
 * Plugin URI:        https://chooserethink.com
 * Description:       Filters the Wordpress search results to show only posts, no other post types.
 * Version:           1.0.0
 * Author:            Brianna Deleasa @ LoudMouse
 * Author URI:        http://loudmouse.com
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       search-filter-only-posts
 * Domain Path:       /languages
 */


// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}


add_filter( 'pre_get_posts', 'sfop_filter_search_to_only_posts' );
/**
 * Filters the front end search form so it only searches through posts.
 *
 * @since 1.0.0
 *
 * @param $query
 * @return mixed
 */
function sfop_filter_search_to_only_posts($query) {

	if ( $query->is_search && ! $query->is_admin() ) {
		$query->set( 'post_type', 'post' );
	}
	return $query;

}