61 lines
1.3 KiB
PHP
61 lines
1.3 KiB
PHP
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<?php
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if( ! defined( 'ABSPATH' ) ){
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exit; // Exit if accessed directly.
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}
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/**
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* Extend WordPress search to include custom fields
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*
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* https://adambalee.com
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*/
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/**
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* Join posts and postmeta tables
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*
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* http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_join
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*/
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function cf_search_join( $join ) {
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global $wpdb;
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if ( is_search() ) {
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$join .=' LEFT JOIN '.$wpdb->postmeta. ' ON '. $wpdb->posts . '.ID = ' . $wpdb->postmeta . '.post_id ';
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}
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return $join;
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}
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add_filter('posts_join', 'cf_search_join' );
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/**
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* Modify the search query with posts_where
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*
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* http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_where
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*/
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function cf_search_where( $where ) {
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global $pagenow, $wpdb;
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if ( is_search() ) {
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$where = preg_replace(
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"/\(\s*".$wpdb->posts.".post_title\s+LIKE\s*(\'[^\']+\')\s*\)/",
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"(".$wpdb->posts.".post_title LIKE $1) OR (".$wpdb->postmeta.".meta_value LIKE $1)", $where );
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}
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return $where;
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}
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add_filter( 'posts_where', 'cf_search_where' );
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/**
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* Prevent duplicates
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*
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* http://codex.wordpress.org/Plugin_API/Filter_Reference/posts_distinct
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*/
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function cf_search_distinct( $where ) {
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global $wpdb;
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if ( is_search() ) {
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return "DISTINCT";
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}
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return $where;
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}
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add_filter( 'posts_distinct', 'cf_search_distinct' );
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