How to get matched location_name on runtime by lua

[Namesen]

In rewrite_by_lua phase， I want to get the matched location name on runtime。
For example：
nginx server config：

server {
        listen 80;
        server_name 127.0.0.1;
        location /test {
		return 200 "test";
	}
        location /test/api {
		return 200 "test";
	}
	location ~ /id/\d* {
		return 200 "api";
	}
}

if I visit http://127.0.0.1/test/api/abc, I want get the nginx location name: /test/api
if I visit http://127.0.0.1/test/ddd, I want get the nginx location name: /test
if I visit http://127.0.0.1/id/123, I want get the nginx location name: /id/\d*

openresty version: 1.19.3.1

can you help me？