elasticpress-fine-tuning.php

<?php
/**
 * ElasticPress Fine Tuning
 *
 * @package     ElasticPressFineTuning
 * @author      Bernhard Kau
 * @license     GPLv3
 *
 * @wordpress-plugin
 * Plugin Name: ElasticPress Fine Tuning
 * Description: This plugin changes some ElasticPress parameters for better search results.
 * Version: 1.0.0
 * Author: Bernhard Kau
 * Author URI: http://kau-boys.de
 * Plugin URI: https://gist.github.com/2ndkauboy/
 * License: GPLv3
 * License URI: http://www.gnu.org/licenses/gpl-3.0
 */

/**
 * Fine tune the arguments
 *
 * @param array $formatted_args The formatted args array for the query.
 * @param array $args           The raw query args array.
 *
 * @return array                The changed formatted args array
 */
function elasticpress_fine_tuning_ep_formatted_args( $formatted_args, $args ) {

	$search_fields = array(
		'post_title^4',
		'post_excerpt^2',
		'post_content',
	);

	$query = array(
		'bool' => array(
			'should' => array(
				array(
					'multi_match' => array(
						'query'                => $args['s'],
						'type'                 => 'phrase',
						'fields'               => $search_fields,
						'fuzziness'            => 'AUTO',
						'minimum_should_match' => '2<-25%',
					),
				),
				array(
					'multi_match' => array(
						'query'     => $args['s'],
						'fields'    => $search_fields,
						'operator'  => 'and',
						'fuzziness' => 'AUTO',
					),
				),
			),
		),
	);

	$formatted_args['query'] = $query;

	return $formatted_args;
}

add_filter( 'ep_formatted_args', 'elasticpress_fine_tuning_ep_formatted_args', 10, 2 );