drupal-8.admin_theme_0.php in Drupal 8

Test fixture.

File

core/modules/system/tests/fixtures/update/drupal-8.admin_theme_0.php

<?php

/**
 * @file
 * Test fixture.
 */
use Drupal\Core\Database\Database;
$connection = Database::getConnection();
$config = unserialize($connection
  ->query("SELECT data FROM {config} where name = :name", [
  ':name' => 'system.theme',
])
  ->fetchField());
$config['admin'] = '0';
$connection
  ->update('config')
  ->fields([
  'data' => serialize($config),
])
  ->condition('name', 'system.theme')
  ->execute();