Drupal 7 Module Development

Now we have created our first.info file. As soon as Drupal reads this file, the
module will appear on our Modules page.
Chapter 2
In the screenshot, notice that the module appears in the DRUPAL 7 DEVELOPMENT
package, and has the NAME and DESCRIPTION as assigned in the .info file.
With our .info file completed, we can now move on and code our .module file.
Modules checked into Drupal's version control system will
automatically have a version directive added to the .info file.
This should typically not be altered.
Creating a module file
The .module file is a PHP file that conventionally contains all of the major hook
implementations for a module. We discussed hooks at a high level in the first
chapter. Now we will gain some practical knowledge of them.
A hook implementation is a function that follows a certain naming pattern in order
to indicate to Drupal that it should be used as a callback for a particular event in the
Drupal system. For Object-oriented programmers, it may be helpful to think of a
hook as similar to the Observer design pattern.
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