Create a simple Drupal 7 module - Hello World page

A Drupal module is made at least by 2 elements :

• a .info file
• an other file (.php, .inc ?)

To choose a name for you module, don't forget those basic rules :

• no capital letter
• no special character (excepted _ underscore)

Your first .info file

A .info is in fact a your_module_name.info file.
Let's make in your example a drupal_test module.

name (mandatory)

The name of your module (with capital letters and spaces this time, if you want)

name = Drupal Test Module

description (recommended)

description = A super duper test module !

core (mandatory)

core = 7.x

files[]

The location of your (php ?) files
files[] = inc/example.php

The whole .info file 

name = Drupal Test Module
description = Provides a really neat widget for your site's sidebar.
core = 7.x
files[] = inc/example.php

For Drupal 7, you can find all informations about .info files here:
https://drupal.org/node/542202

 Now the example.php file

 You can now edit your php file, located in /sites/all/modules/drupal_test/inc/example.php

We will make a simple "Hello World" test. We will

• make a menu link (make shortcut like http://www.mywebsite.com/drupal_test/mylink)
• create a basic content (your "Hello World")

in your example.php module, create a drupal_test_menu() function.

function drupal_test_menu() {
    $items['drupal_test/mylink'] = array(
      'page callback' => 'drupal_test_hello_world',
    );
    return $items;
  }

This part redirects http://www.mywebsite.com/drupal_test/mylink to your website, and calls the

drupal_test_hello_world()function.

function drupal_test_hello_world() {
    return array(
      '#markup' => '<p>Hello world</p>', 
    );
  }

 That's it !

If you have questions, i'll try to answer you. Do not hesitate to leave comments.