Form builder; Configure error reporting settings.
system_logging_settings_submit()
function system_logging_settings($form, &$form_state) {
$form['error_level'] = array(
'#type' => 'radios',
'#title' => t('Error messages to display'),
'#default_value' => config('system.logging')
->get('error_level'),
'#options' => array(
ERROR_REPORTING_HIDE => t('None'),
ERROR_REPORTING_DISPLAY_SOME => t('Errors and warnings'),
ERROR_REPORTING_DISPLAY_ALL => t('All messages'),
ERROR_REPORTING_DISPLAY_VERBOSE => t('All messages, with backtrace information'),
),
'#description' => t('It is recommended that sites running on production environments do not display any errors.'),
);
return system_config_form($form, $form_state);
}