讓 WordPress 只搜索文章的標(biāo)題

WordPress 默認(rèn)的搜索功能還真挺弱的，搜索出來(lái)的結(jié)果很不符合人意，如果你想讓它檢索出來(lái)的結(jié)果更加相關(guān)，可以限定只搜索文章的標(biāo)題，將下面的代碼添加到主題的 functions.php 文件即可：

/**
 * 讓 WordPress 只搜索文章的標(biāo)題
 * http://www.ydqwiac.cn/search-by-title-only.html
 */
function __search_by_title_only( $search, &$wp_query )
{
	global $wpdb;

	if ( empty( $search ) )
        return $search; // skip processing - no search term in query

    $q = $wp_query->query_vars;    
    $n = ! empty( $q['exact'] ) ? '' : '%';

    $search =
    $searchand = '';

    foreach ( (array) $q['search_terms'] as $term ) {
    	$term = esc_sql( like_escape( $term ) );
    	$search .= "{$searchand}($wpdb->posts.post_title LIKE '{$n}{$term}{$n}')";
    	$searchand = ' AND ';
    }

    if ( ! empty( $search ) ) {
    	$search = " AND ({$search}) ";
    	if ( ! is_user_logged_in() )
    		$search .= " AND ($wpdb->posts.post_password = '') ";
    }

    return $search;
}
add_filter( 'posts_search', '__search_by_title_only', 500, 2 );

參考資料：http://wordpress.stackexchange.com/questions/11822/