Is it possible to make two different Sitemaps for different domains but with the same root directory?

Question

PHP

There are two domains that refer to the same folder.
For example site1.ru and site2.ru,
now the sitemap contains locs of the form site1.ru....
How to make it so that if you go to site2.ru/sitemap.xml, then the domain url in locs is site2.ru.. , and for site1.ru it is similar to site1.tu...?

Answer 1

.htaccess file

RewriteEngine On
RewriteBase /

RewriteRule sitemap.xml sitemap.php

Sitemap.php file

$host=$_SERVER['HTTP_HOST'];
if($host=='site1.ru') echo file_get_contents('sitemap_xml_site1_ru.xml');
if($host=='site2.ru') echo file_get_contents('sitemap_xml_site2_ru.xml');