How to auto base_url in codeigniter 4.3

i test multi domain in codeigniter 4.3 but dont work, can someone show me.

PHP Code:

public string $baseURL = 'http://localhost:8080/ciall/ci4/ci43/public/';
public array $allowedHostnames = ['http://123.1.1.3:8080/ciall/ci4/ci43/public/']; 


in home.php controller  i echo base_url() it default

Code:

base_url= http://localhost:8080/ciall/ci4/ci43/public/

1. i want if i write localhost:8080  base_url echo http://localhost:8080/ciall/ci4/ci43/public/
2. if i write http://123.1.1.3:8080/ciall/ci4/ci43/public base_url() echo http://123.1.1.3:8080/ciall/ci4/ci43/

thank your for reading