Without config file, extract($phpbb_config_php_file->get_all()); breaks

When cloning the latest develop version there's no config.php file included. This causes the extract function in common.php to break:

$phpbb_config_php_file = new \phpbb\config_php_file($phpbb_root_path, $phpEx);
extract($phpbb_config_php_file->get_all());