How to Set Allowed PHP File Extensions for a Domain =================================================== While .php is the most common extension for modern PHP websites, in some cases, websites may be coded to use non-standard extensions such as .phtml or .php3. With the Non-Standard PHP Extensions form in SiteWorx, users can easily add the non-standard extensions that their websites may need. .. contents:: To Set Allowed Non-Standard PHP Extensions in SiteWorx ------------------------------------------------------ #. Log into SiteWorx from the browser (https://ip.ad.dr.ess:2443/siteworx) #. In SiteWorx, navigate to **Hosting Features > Domains > Manage**, either from the side menu or SiteWorx home #. Click **...** next to the domain to show more options #. Select **PHP Extensions**. This opens the Set Allowed PHP Extensions form .. image:: /images/sw-php-extensions.png :alt: php extentions select dropdown #. Update the PHP File Extensions field with the desired extensions. Each should be on its own line, without a preceding period .. image:: /images/sw-php-extensions-form.png :alt: php extensions form #. Click **Save**