Tutorials - Drupal

Get Database Schema

$schema = \Drupal\Core\Database\Database::getConnection()->schema();

Entity Field types, Data types

(BaseFieldDefinition::create types)

To set Drupal System variables you can use the $settings (on Drupal 8) and $conf (On Drupal 7) array of setting.php file.

Examples.

On Drupal 8

$settings['file_public_path'] = '/path/to/dir/public';

To set Drupal System variables you can use the $settings (on Drupal 8) and $conf (On Drupal 7) array of setting.php file.

Examples.

On Drupal 8

$settings['file_public_path'] = '/path/to/dir/public';

Create a custom module (here : example)

For active themes by route you first have to define a service in your $module.services.yml file:

On example.services.yml

Add:

Get the default cache bin

$cache = \Drupal::cache();

To get a particular cache bin (here 'render'):

$render_cache = \Drupal::cache('render');

Step 1: Activate RESTful Webservice

Active modules:
HAL (hal)
RESTful Web Services (rest)    
HTTP Basic Authentication (basic_auth)

Download and active contrib modules:
REST UI (restui)

You can call drupal 8 services statically as D7, but it is not the best practice (Like Here).
Example : $uuid = \Drupal::service('uuid')->generate();

Create a Service on Drupal 8

1.  Create a custom module (here : mytest)

2. Create the service Class
Example: src/MTService.php

Get All available services list

$services = \Drupal::getContainer()->getServiceIds();

Few use full services

//Generate a new UUID
$uuid = \Drupal::service('uuid')->generate();