添加自定义字段wordpress在搜索范围内

add_action(posts_search, function($search, $query){global $wpdb;if ($query->is_main_query() && !empty($query->query[s])) {$sql = " OR EXISTS (SELECT * FROM {$wpdb->postmeta} WHERE post_id={$wpdb->posts}.ID and meta_key = product_no and meta_value like %s)";$like= \% . $wpdb->esc_like($query->query[s]) . \%;$search.= $wpdb->prepare($sql, $like);}return $search;},2,2);

只需将上述字段product_no用你需要的相关字段替换。