Not exercuting all the code at once

[Dun4d]

Hi
I'm trying to build a very basic CMS. Just using MySQL and PHP. My problem is that I want my post on the site to be like mysite.com/?id=1 instead of mysite.com/post.php?id=1. So I have insearted the PHP code from post.php to index.php. Now my problem is how do I get the code to only exercute a part of it instead of it. So when it goes to index.php, you get the index page and when it goes to index.php?id=1 it just gets the post.

Thanks

[thorpe]

if (isset($_GET['id'])) {
  switch($_GET['id']) {
    case 1:
      // code for case 1.
      break();
    default:
      // code for default (index.php)
      break();
  }
} else {
  // code for default (index.php)
}