Backoffice Displays Php Code

[omine]

Some times, when i enter on BackOffice login page, the page displays a blank page with this:

* @copyright 2007-2011 PrestaShop SA * @version Release: $Revision: 1.4 $ * @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) * International Registered Trademark & Property of PrestaShop SA */ /* Send the proper status code in HTTP headers */ header('HTTP/1.1 404 Not Found'); header('Status: 404 Not Found'); if (in_array(substr($_SERVER['REQUEST_URI'], -3), array('png', 'jpg', 'gif'))) { require_once(dirname(__FILE__).'/config/settings.inc.php'); header('Location: '.__PS_BASE_URI__.'img/404.gif'); exit; } require_once(dirname(__FILE__).'/config/config.inc.php'); ControllerFactory::getController('PageNotFoundController')->run();

Normally, i "solve" by refreshing the browser F5, then, the login page reload and is rendered correctly.

 

Sporadically, while navigating inside BackOffice pages, the same happens and i solve with F5 (refresh).

 

The server is not running any cache system like opcache, memcache  or apc.
 

PS 1.6.1.1
OS: Linux CentOS 7
PHP 5.5.28
Cache options: File System (Recompile templates if the files have been updated)
Apache/2.2.31

Interesting note, this always happened with PrestaShop on all versions. I'm using PrestaShop since version 4. But i never  give importance. 

But now i would like to know if this is a bug or some misconfiguration. 

This happens not only on specific environment. Happens on any environment, any version.. Maybe some bug from PrestaShop compile cache system.

Edited January 13, 2016 by omine (see edit history)

[im_presto]

please check php file, it may have php opening tag issue.

[omine]

The problem is intermittent.

 

If has an PHP sintax error, the problem should be continuous.

[tuk66]

Check if your server can run PHP.

[omine]

Found the the reason!

The website is running under cgi mode.

 

The default fcgi timeout was configured to 20 seconds.

 

I just increased the timeout by adding this code on httpd.conf:

FcgidIOTimeout 300

Edited February 9, 2016 by omine (see edit history)

[kirubanidhi]

Im using pretashop 1.5.6.2 ....

 

While migrating a multistore prestashop to a new domain.The prestashop front-office is working fine but back-office is getting css error. I attached my image link. How to resolve this problem. 
Link:  https://s21.postimg.org/88hjk9m07/prestashop_1_5_back_office.png