Drupal 8

Here an example to get the current page path programmatically in Drupal 8

    $current_url = Url::fromRoute('<current>');

    $path = $current_url->toString();

Exemple : Field 'username'

Store data on session.

Example:

$session = new \Symfony\Component\HttpFoundation\Session\Session();

$session->set('var_name', $session->get('var_name',0) + 1);

drupal_set_message($session->get('var_name'));

There are several ways to do that.

Using entityQuery, you can get the taxonomy terms  of a particular vocabulary.

In drupal 8, this retrun taxonomy vocabularies as an array.

$vocabularies = \Drupal\taxonomy\Entity\Vocabulary::loadMultiple();

Comments are set as a field, so by default it is not present. To add comment field Goto:

Admin -> Structure -> Content types ->"YOUR CONTENT"

  ->Manage fields->Add field

  ->Select 'Comments' on 'Re-use an existing field' and Save.

Reson 1 : FollowSymLinks

By default, virtualmin does not support Options +FollowSymLinks (on .htaccess).

Solution 1 : Recommended

In addition to the Step 2, Just add

    $form['#cache']['disabled'] = TRUE;

    $form['#cache']['max_age'] = 0;

1. Create a info.yml file

Here : test.info.yml

name: 'Test Module'

description: 'Test module for Drupal8.ovh'

type: module

core: 8.x

varsion: 0.1-dev

package: Test