Answered by : cooperative-cormorant-hipqs32x42w2

//$_GET
$name = \Drupal::request()->query->get('name');
//$_POST
$name = \Drupal::request()->request->get('name'); // form param

Source : https://drupal.stackexchange.com/questions/207044/how-to-get-post-and-get-parameters | Last Update : Wed, 12 Jan 22