eZ\Publish\Core\MVC\Symfony\Cache\PurgeClientInterface::purge PHP Method

    public function purge($locationIds);

 public function purgeForContent($contentId)
 {
     $contentInfo = $this->contentService->loadContentInfo($contentId);
     $event = new ContentCacheClearEvent($contentInfo);
     $this->eventDispatcher->dispatch(MVCEvents::CACHE_CLEAR_CONTENT, $event);
     $locationIds = [];
     foreach ($event->getLocationsToClear() as $location) {
         $locationIds[] = $location->id;
     }
     $this->purgeClient->purge(array_unique($locationIds));
 }