There are also some other file types that you might see on a web server. These files are usually to give you more power and flexibility on your website.
.php and .php3
The .php extension is nearly as popular as .html or .htm on web pages. This extension indicates a PHP page. PHP is a web scripting program that brings scripting, macros, and includes to your website.
.shtm and .shtml
The .shtml extension indicates an HTML file that should be viewed with the SSI interpreter. SSI stands for Server Side Includes. These allow you to include one web page inside another, and add macro-like actions to your websites.
.asp
A .asp file indicates that the web page is an Active Server Page. ASP provides scripting, macros, and include files to a website. It also provides database connectivity and much more. It is most often found on Windows web servers.
.cfm and .cfml
These file types indicate that the file is a ColdFusion file. ColdFusion is a powerful server-side content management tool that brings macros, scripting, and more to your web pages.
