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