How to check if maintenance mode is enabled in Drupal 8? I've been searching for a way to check in PHP if the maintenance mode of my Drupal website is enabled, but I only found some solutions for Drupal 7, which doesn't seem to work on D8. 

Have got any ideas? 

Thank you.
The maintenance mode of the site is a boolean value stored in a state. You can access it like this:

$state = \Drupal::state()-&gt;get('system.maintenance_mode');