drupa8でhook_init()する方法

カスタムモジュールで対応

module_name
 +- src
 |   +- EventSubscriber
 |       +- Module_nameSubscriber.php
 +- module_name.info.yml
 +- module_name.services.yml

module_name.info.yml

name: Module name
type: module
description: 〜
core: 8.x

module_name.services.yml

services:
  module_name_event_subscriber:
    class: Drupal\module_name\EventSubscriber\Module_nameSubscriber
    tags:
      - {name: event_subscriber}

src/EventSubscriber/Module_nameSubscriber.php

<?php

namespace Drupal\min_init\EventSubscriber;

use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class Min_initSubscriber implements EventSubscriberInterface {

  public function checkForRedirection(GetResponseEvent $event) {
    $request_uri = $_SERVER['REQUEST_URI'];
    \Drupal::logger('min_init')->notice($request_uri);
    if (preg_match('!^(/node/[0-9]+/)(edit|clone/prepopulate).*?destination=node/[0-9]+$!', $request_uri, $m)) {
      $path = \Drupal\Core\Url::fromUserInput($m[1] . $m[2]);
      $response = new RedirectResponse($path->toString());
      $response->send();
    }
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::REQUEST][] = array('checkForRedirection');
    return $events;
  }

}