Drupal

GET:

$url_via_get = \Drupal::request()->query->get('url');

POST:

$url_via_post = \Drupal::request()->request->get('url');

GET [or] POST:

$url_via_get_or_port = \Drupal::request()->get('url');

Problem:

InvalidArgumentException: The controller for URI "/admin/flush" is not callable. in Drupal\Core\Controller\ControllerResolver->getControllerFromDefinition() (Line 53 in /var/www/core/lib/Drupal/Core/Controller/ControllerResolver.php).

Solution?

Problem:

#drush cr
 [error]  Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException: No route found for the specified format html. Supported formats: csv, json. in Drupal\Core\Routing\RequestFormatRouteFilter->filter() (line 65 of /var/www/core/lib/Drupal/Core/Routing/RequestFormatRouteFilter.php).

Solution?

Error:

Exception: Object of type stdClass cannot be printed. in Drupal\Core\Template\TwigExtension->escapeFilter() (Line 459 in /var/www/web/core/lib/Drupal/Core/Template/TwigExtension.php).

Solution

There may be a syntax error in your Twig code or you should change the order of fields in Drupal Views.

$node->set('field_my_datetime', '2025-01-18T11:28:00');

$node->set('field_my_datetime', date('Y-m-d\TH:i:s', time()));

Notice: See the difference between T and \T above.

Problem:

After Drupal core + module updates:

The roles anonymous & authenticated disapeared

Instead of the page content I get this error: "You don't have access to this page".

Solution:

Export config from your website: drush cex

Export config from your old website or a new Drupal installation.

Move two files to the config dir of your websites sync directory:

Problem:

Problem:

composer.json:

"conflict": {
        "drupal/drupal": "*"
    },

What is the meaning of "conflict" in composer.json?