Drupal: Create "hello world" module in drupal 7

This tutorial will show you the easiest way to create a module for drupal 7.

Begin:

1. Go to 'modules' of drupal 7.
2. Create 'hello_world' folder.
3. Create two blank files: hello_world.info and hello_world.module under 'hello_world' under 'hello_world' folder.
4. Open 'hello_world.info' and enter this content:
   

   name = Hello World
   description = This is my first module
   core = 7.x

5. Go to 'Modules' at back-end, You will see your module listed here. Don't enable this module, because we still not finish yet.
   
6. Create a menu link to call a page where will show 'hello world'. Open 'hello_world.module' and enter this content:
   

   function hello_world_menu() {
   
   

   $items['hello-world'] = array(

   
   
   

   'title' => 'Hello World',

   
   
   

   'page callback' => 'hello_world',

   
   
   

   'access arguments' => array('access content'),

   
   
   

   );

   
   
   

   return $items;

   
   }
   
   function hello_world() {
   
   

   return "hello world";

   
   }

7. Go to home page and the result will look like this: