我用的是ubuntu kylin16.04，apache2版本是Apache/2.4.18，php版本是PHP 7.0.4-7ubuntu2.1 (cli) ( NTS )，mysql版本5.0，在浏览器输入http://localhost/drupal-7.43/后返回的是：

<?php

/**  * @file  * The PHP page that serves all page requests on a Drupal installation.  *  * The routines here dispatch control to the appropriate handler, which then  * prints the appropriate page.  *  * All Drupal code is released under the GNU General Public License.  * See COPYRIGHT.txt and LICENSE.txt.  */

/**  * Root directory of Drupal installation.  */ define('DRUPAL_ROOT', getcwd());

require_once DRUPAL_ROOT . '/includes/bootstrap.inc'; drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL); menu_execute_active_handler();

请教大神这是为什么