Are there any potential issues or limitations with using server-side redirection methods like mod_rewrite for subdomain redirection?

One potential issue with using server-side redirection methods like mod_rewrite for subdomain redirection is that it may not be the most efficient or scalable solution, especially for a large number of subdomains. To solve this issue, you can consider using a dynamic routing approach in your application code to handle subdomain redirection.

// Dynamic subdomain redirection in PHP
$subdomain = explode('.', $_SERVER['HTTP_HOST'])[0];

switch ($subdomain) {
    case 'subdomain1':
        header('Location: https://subdomain1.example.com');
        break;
    case 'subdomain2':
        header('Location: https://subdomain2.example.com');
        break;
    default:
        // Handle default redirection or error
        break;
}