Joomla 1.7 - empty admin page

Question

Until a few weeks after installing and configuring Joomla, the admin panel stopped working. After going to http://xxx.pl/administrator or ... /administrator/index.php there is nothing but a blank page. This is strange, but when I moved all the contents of the configured Joomla to a subfolder, say, "abc", everything was fine. I searched many forums many times, but all the answers were similar to "Try reinstalling it." Is there any other way to fix this?
EDIT: I will add here what I wrote in the comments below.

• Clearing the browser cache does not change anything
• The problem exists in Firefox, Chrome, IE 8-9
• Logs are empty

In fact, it is annoying that everything works fine after copying the entire Joomla to its subfolder. Maybe reconfigure the .htaccess file? If so, how do I redirect all pages to my copy in my subfolder? I mean:

• example.com => example.com/abc
• example.com/administrator => example.com/abc/administrator
• and etc.

Answer 1

What is the HTTP status code when trying to access it?

(If you don’t know how to view this information, see: View HTTP headers in Google Chrome )

If the status code is 500, add:

ini_set('display_errors', 1); error_reporting(E_ALL); 

at the top of your /administrator/index.php and see if any error appears.

If the error you received is something else, are you sure that your Apache DocumentRoot or your vhost configuration is ok?

Answer 2

• Check if PHP is broken. Put a very simple script in the root directory (for example, <?php echo '1'; ?> ), Navigate to it using a web browser and see if PHP is working.
• What happens if you run the index.php script directly from the command line? For instance. $ /path/to/php /path/to/joomla/administrator/index.php Do you get a reasonable result or errors? You can redirect the output to a file (e.g. > test.html ) and navigate to that file in your web browser to see if it contains anything useful.

Answer 3

I suddenly began to get a blank page on all the administrator login pages on my sites, I could not get access to the administration section, when only a day before everything worked, I didn’t change anything on the server side.

Fortunately, after a little testing and checking with other browsers (which work fine), I noticed that at some point I had to disable the java script in firefox, as soon as I turned it on again, everything returned to its normal state, again logging in the system was normal, there is no blank page.

Hope this helps someone with their problem.