--- /dev/null
+<?php
+
+namespace Drupal\system\Form;
+
+use Drupal\Core\Form\ConfigFormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Configure logging settings for this site.
+ */
+class LoggingForm extends ConfigFormBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'system_logging_settings';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getEditableConfigNames() {
+ return ['system.logging'];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ $config = $this->config('system.logging');
+ $form['error_level'] = [
+ '#type' => 'radios',
+ '#title' => t('Error messages to display'),
+ '#default_value' => $config->get('error_level'),
+ '#options' => [
+ ERROR_REPORTING_HIDE => t('None'),
+ ERROR_REPORTING_DISPLAY_SOME => t('Errors and warnings'),
+ ERROR_REPORTING_DISPLAY_ALL => t('All messages'),
+ ERROR_REPORTING_DISPLAY_VERBOSE => t('All messages, with backtrace information'),
+ ],
+ '#description' => t('It is recommended that sites running on production environments do not display any errors.'),
+ ];
+
+ return parent::buildForm($form, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ $this->config('system.logging')
+ ->set('error_level', $form_state->getValue('error_level'))
+ ->save();
+
+ parent::submitForm($form, $form_state);
+ }
+
+}