ขอทราบวิธีการอัพโหลดรูปข้าม Sub Domain ทีค่ะ ต้องเขียนอย่างไรคะ

<?php

// Define the upload paths for the different subdomains.
$subdomain1_upload_path = '/home/subdomain1/public_html/uploads/';
$subdomain2_upload_path = '/home/subdomain2/public_html/uploads/';

// Get the subdomain from the request.
$subdomain = $_SERVER['HTTP_HOST'];

// Check if the subdomain is valid.
if (!in_array($subdomain, array('subdomain1', 'subdomain2'))) {
  die('Invalid subdomain');
}

// Get the uploaded file.
$uploaded_file = $_FILES['image'];

// Copy the uploaded file to the correct path.
if ($subdomain == 'subdomain1') {
  copy($uploaded_file['tmp_name'], $subdomain1_upload_path . $uploaded_file['name']);
} else {
  copy($uploaded_file['tmp_name'], $subdomain2_upload_path . $uploaded_file['name']);
}

// Set the correct headers for the response.
header('Content-Type: application/json');
header('Content-Length: 0');

// Exit the script.
exit();

?>