How to integrate a booking form?

Question

... preferably with PHP. I am new to Drupal.

My goal is to integrate a page into an already existing project which enables to give to users the possibility to book a Hotelroom or a flight ticket while the Administrator (me) then collects the submitted information and validates the choice in the backend.

I have done this countless of times from scratch in PHP with POST. But on Drupal, when I try to integrate HTML and PHP code into a new webform or new article page, it doesnt really render it.

Answer 1

After reading your question I would do the following:

Create a custom module with a custom block that holds the booking form. This way you can add the booking form on whatever page you like with the Context module for example.

The Drupal 7 example module can show and teach you how to create a block in a custom module.

Answer 2

By altering the Webform you can achieve. I know this is not the exact solution but you can achieve by doing some customization.

Alter webform and add php/Html code.
Implement the "hook_form_FORM_ID_alter".

function YOUR_MODULE_form_FORM_ID_alter(&$form, &$form_state, $form_id) {
    //check how you can use #submit/#validate to call custom function
    //Write your code in custom function. 
}