WordPress默认的搜索功能，使用户搜索结果包括文章内容、文章标题与文章标签 这样搜索出来的结果不会很精确，如果你想让它搜索出来的结果更精确、相关，可以限定只搜索文章的标题。

将下面的代码添加到主题的 functions.php 文件即可实现：

//让WordPress只搜索文章的标题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'] ) ? '' : '{5cc1b29162d549a8071384de182cc9fc6e6a0fd85e7907f22fd9e18cff4269c3}';    $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 );