Is there a way to use PHP on a subdomain?

Question

Pardon the dummy question, but I am trying to breakdown a bunch of web pages into subdomains and bring them up using a settings.php page. The problem is that I can only find this for the settings page:

<?php

// WEBSITE Settings
// ******************************
// Domain Name (without: http://)
define('DOMAIN_NAME', 'mydomain.com');


// Website URL // MUST be: http://www.yourdomain.com
// DO NOT include any sub-folder
define('SITE_URL', 'http://'WHYNOSUB-FOLDER.mydomain.com');
?>

Any suggestions? Thanks much, joe

Answer 1

We don't have much to go on since this looks like an existing app you are trying to implement but I don't see why this wouldn't work on a subdomain based on what little code we have to see. Have you tried it? That's the best way to find out.

Answer 2

You can do as you've suggested (including a settings.php that has a hard coded domain/subdomain). The only problem with that being that you need to create a settings.php for every subdomain you create.

A more dynamic way is to use Apache's mod_rewrite. You'll obviously need to be running on Apache and not IIS.

Here is an intro to mod rewrite

I think what you want to do is get the subdomain and append that to the url as a get parameter. That way the php script can retrieve the parameter to find out what subdomain was requested. Something like this...

RewriteCond %{HTTP_HOST} ^(.*)\.example\.com$
RewriteRule ^(.*)$ http://www.example.com/?subdomain=%1

The php script then just has to check the subdomain parameter to see what subdomain was requested.