LoggingForm.php

<?php

namespace Drupal\system\Form;

use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Form\RedundantEditableConfigNamesTrait;

/**
 * Configure logging settings for this site.
 *
 * @internal
 */
class LoggingForm extends ConfigFormBase {
    use RedundantEditableConfigNamesTrait;
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'system_logging_settings';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $form['error_level'] = [
            '#type' => 'radios',
            '#title' => $this->t('Error messages to display'),
            '#config_target' => 'system.logging:error_level',
            '#options' => [
                ERROR_REPORTING_HIDE => $this->t('None'),
                ERROR_REPORTING_DISPLAY_SOME => $this->t('Errors and warnings'),
                ERROR_REPORTING_DISPLAY_ALL => $this->t('All messages'),
                ERROR_REPORTING_DISPLAY_VERBOSE => $this->t('All messages, with backtrace information'),
            ],
            '#description' => $this->t('It is recommended that sites running on production environments do not display any errors.'),
        ];
        return parent::buildForm($form, $form_state);
    }

}