Displaying Code to Public Error

[namecomp]

Hello,

I have a script installed, and it showed the codes to the public, which is errornous, the script is not suppose to run like this. It actually displays this entire code in the main page of my domain name:

<?php require_once('includes/config.php');
$keyword=$mainkeyword;
$pagetype="contentpage";
$static_article="index.txt";
include('includes/pages.php'); ?>

It is not suppose to work like that. Can anyone please tell me why? Attached is a screenshot.

[rangana]

Have you gone verifying your extension as .php..You might have saved it as .htm/.html.

[tech_support]

Do you have PHP on your server?