Above your script add in the following line:

ini_set('display_errors', 'On');
?>

When trying to access cached pages in WordPress you receive a 403 Permission Denied or 403 Forbidden error.

To fix you must add the following line to your wp-config.php (Add it above the WP_CACHE define.) Then clear your cache.
umask( 0022 );

If your PHP runs as a different user to Apache and permissions are strict Apache may not be able to read the PHP generated cache files.

When trying to open a word document you get the following error:

“Word experienced an error trying to open the file. Try these suggestions”.

To get round this – right click on the file and select properties.

Next click unblock.

When trying to open a file in Excel 2010 you get the following error:

“The file is corrupt and cannot be opened”

1. Open Excel 2010.
2. Click on File > Options.
3. Select Trust Center > Trust center settings.
4. Select Protected view.
5. Uncheck all the options under Protected View > OK.
6. Restart Excel 2010 and try to open Excel documents.