Activating the plugin

Let's activate this plugin so we can have a look at what it does:

You should now see a random lyric appear in the top-right portion of the Dashboard. Refresh the page a few times to get the full effect.

Examining the hello.php file

Now that we've tried out the "Hello Dolly" plugin, let's have a closer look. In your favorite text editor, open up the /wp-content/plugins/hello.php file. Can you identify the following integral parts?

It looks pretty simple, right? That's all you need for a plugin:

Now that we've identified the critical component parts, let's examine them in more detail.