cors.php

<?php

if (isset($_GET['origin'])) {
		
	switch($_GET['origin']) {
		case '*':
			header("Access-Control-Allow-Origin: *");
			break;
			
		case 'www':
			$server = isset($_SERVER['HTTP_REFERER']) ? "http://" . parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST) : null;
			header("Access-Control-Allow-Origin: $server");
			break;
	}
}
 
echo json_encode(['status' => 'ok']);