你可以使用动作钩posts_orderby 在您的子主题函数中。php：

function changeSearchSort( $orderby, $query ){
    global $wpdb;

    if(!is_admin() && is_search()) {
        $orderby =  $wpdb->prefix."posts.post_date ASC";
    }
    return  $orderby;
}
add_filter(\'posts_orderby\',\'changeSearchSort\',10,2);