Objective

Create a custom module with a form to set/get custom system variables from Drupal. We're going to add custom permissions to access this new page. Bonus: add simple page to count every node for each content type.

Summary

• Step 1: create custom module
• Step 2: call hook_menu and hook_permissions
• Step 3: create custom callbacks for new menus
• Step 4: create a Drupal form by code. Form, validate and submit

• Postal code
• DNI/NIF validation
• Email
• Hour:minute:second
• Replace strings in SQL query
• Search breakline

Postal code

This will check european postal code (eg: 28008) and US postal code (eg: 12005-1234)

• Simple ajax example to show some info every 3 seconds, loading it from php in your plugin or theme functions.php file

Javascript

• Include this code in your theme header.php for example

<script type="text/javascript">

Summary

• Step 1: create page from WordPress admin and note the url slug
• Step 2: create a file in your active theme named 'page-url-slug.php'
• Step 3: load WordPress header and footer in the file