Create Drupal 7 custom module

For custom module in drupal 7, we have create some file which is listed below.

Create your first "demo" Drupal 7 module with the following steps.

1. Create a folder called demo in sites/all/modules/custom
2. Create a demo.info file
3. Create a template file page-demo.tpl.php in your theme directory
4. Enable your module at http://domain.com/admin/build/modules
5. Visit http://domain.com/demo

This belongs into your demo.info file:

;$Id$

name = demo
description = A demo module created by Ashish.
package = Drupal 7 Development
core = 7.x
files[] = demo.module

;dependencies[] = autoload
;php = 5.2

The demo.module file

/**
* @file
* demo - Rick's demo module
* By Rick Smith of Cryptosmith
* This thing is too trivial to deserve protection
* through "intellectual property rights."
* This is my first attempt to write Drupal code
* and I probably don't have the format quite right.
**/
/* the menu hook - adds the path "/demo" to the site. */

function demo_menu(){
$items['demo'] = array(
'page callback' => 'demo_my_page',
'access arguments' => array('access content'),
);
return $items;
}


/* this code (noted in the callback above) creates the
* contents of the "demo" page */

function demo_my_page(){
$form = array();
$form['demo_my_name'] = array(
'#type' => 'textfield',
'#title' => t('My Name'),
'#default_value' => variable_get('demo_my_name', ''),
'#required' => TRUE,
);
$form['demo_about_me'] = array(
'#type' => 'textarea',
'#title' => t('About Me'),
'#default_value' => variable_get('demo_about_me', ''),
'#required' => TRUE,
);

$form['submit'] = array(
'#type' => 'submit',
'#value' => 'Submit',
);

$form['#submit'][] = 'system_settings_form_submit';
return $form;

}

The theme template file page-demo.tpl.php

print $content;

Note--Please keep php tags in your module file and tpl file.