How to redirect non-www URLs to www without htaccess

In PHP  |  Last Updated on Wed, 22 Jun 2016

To redirect your yourdomain.com to www.yourdomain.com you have to write a simple code using php. Bellow code you have to paste at the top of your page.
 

<?php

        $protocol = (@$_SERVER["HTTPS"] == "on") ? "https://" : "http://";
    
          if (substr($_SERVER['HTTP_HOST'], 0, 4) !== 'www.')
           {
               header('Location: '.$protocol.'www.'.$_SERVER['HTTP_HOST'].''.$_SERVER['REQUEST_URI']);
               exit;
            }

?>

 
And now when someone go to your domain like yourdomain.com he will be redirected to www.yourdomain.com.