Problem/Motivation
I faced an issue after I added a purger as the below:
Warning: Array to string conversion in Drupal\purge_purger_http\Plugin\Purge\Purger\HttpPurger->invalidate() (line 51 of modules/contrib/purge_purger_http/src/Plugin/Purge/Purger/HttpPurger.php).
Drupal\purge_purger_http\Plugin\Purge\Purger\HttpPurger->invalidate(Array) (Line: 483)
Drupal\purge\Plugin\Purge\Purger\PurgersService->invalidate(Object, Array) (Line: 84)
Drupal\purge_processor_lateruntime\EventSubscriber\LateRuntimeProcessor->onKernelFinishRequest(Object, 'kernel.finish_request', Object)
call_user_func(Array, Object, 'kernel.finish_request', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.finish_request') (Line: 207)
Symfony\Component\HttpKernel\HttpKernel->finishRequest(Object, 1) (Line: 193)
Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 179)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Steps to reproduce
1- Go to purge settings page "/admin/config/development/performance/purge".
2- Add a new HTTP purger.
3- After refreshing the page it will show the warning.
Proposed resolution
Patch to solve the php warning.
Remaining tasks
User interface changes
API changes
Data model changes