Specify Multiple Subdomains with Access Control Origin

Question

I am trying to allow access to every subdomain on my site in order to allow cross subdomain AJAX calls. Is there a way to specify all subdomains of a site like *.example.c

Answer 1

I tried using this approach to achieve constraint on a specific domain basis:

$allowed_origin = '';
$parts = explode('.', parse_url($_SERVER['HTTP_HOST'])['host']);
if(end($parts).".".prev($parts) === "com.domain") {
    $allowed_origin = $_SERVER['HTTP_ORIGIN'];
    header('Acesss-Control-Allow-Origin: '. $allowed_origin);
}

I hope it works.