You hit a URL and Drupal gives you a page back. Magic! But perhaps you are wondering, what is Drupal doing under the hood? You know that putting it down to magic is not going to help you to create your own custom modules.

Drupal can be a complicated beast. So at this stage, I am not going to go into every little detail. Instead, we will take a look at a simple example to illustrate the main stages in the process.