Drupal API

Drupal is one of the most famous open source CMS. Written in PHP, the first version was relesed in the 2001. Drupal can be used for building a very complex web site and it can be extended thanks to its many modules, or using its APIs, already integrated into the core. Many famous sites have chosen Drupal as CMS:

• NASA
• Oxford University
• NBC
• Tesla Motors
• CNN
• Virgin

Drupal's Web Site: https://www.drupal.org

For testing the APIs, I'll use this web site http://drupalapis.altervista.org/

Site Structure

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Inside the Site Structure folder there are the core elements of the site. Because I use Drupal's API, I have customized some pages.

Views

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The term View in Drupal displays all elemnts that matched with filtres. You can build a view with a specific module, or using the EntityFieldQuery API.

Content Type

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Drupal's content type describes how Drupal's site components are built. For example, my Basic Page content type is made in this way:

As you can see, there is a field_structure, with this field I can use a vocabulary for tagging the content types. This vocubalary is managed by the core module called Taxonomy

For this site, I use the following vocabulary:

Get the site structure

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For getting the site structure, I use this PHP script:

<?php
    $nid = arg(1);
    $node = node_load($nid);
    $taxpage = $node->field_structure['und'][0]['tid'];
?>

I get inside the nid variable the page structure (described by its content type), I load the node and then I access at the field_strcuture field, that is the ID of page's vocabulary term.

Now I can switch throught it:

<?php
    switch ($taxpage) {
        case '1':
            include("home.php");
            break;

        case '3':
            include('section1.php');
            break;
        
        default:
            print("taxonomy id not found");
            break;
    }
?>