Changes for Settings.php file

Drupal 7:

$conf['file_temporary_path'] = 'files/tmp';
$conf['file_private_path'] = 'files/private';
$conf['file_public_path'] = 'files/public';

Drupal 8+:

$settings['config_sync_directory'] = '../config/sync';
$settings['file_public_path'] = '../files/public';
$settings['file_private_path'] = '../files/private';
$settings['file_temp_path'] = '../files/tmp';
$settings['trusted_host_patterns'] = [
  '^example\.com$',
];