wordpress 后台产品搜索如何设置只搜索产品标题,不搜索产品内容？

function modify_product_search($query) {
global $pagenow, $wpdb;

// 仅在后台产品页面进行修改
if (is_admin() && $pagenow == 'edit.php' && isset($_GET['post_type']) && $_GET['post_type'] == 'product' && isset($_GET['s']) && $_GET['s'] != '') {
// 获取搜索词
$search_term = sanitize_text_field($_GET['s']);

// 修改查询以仅搜索标题
$query->query_vars['s'] = $search_term;
$query->query_vars['search_terms'] = array($search_term);
$query->query_where = str_replace('AND ( (' . $wpdb->posts . '.post_title', "AND ( ({$wpdb->posts}.post_title", $query->query_where);
}
}
add_action('pre_get_posts', 'modify_product_search');