Site pages white/blank

There seems to be no shortage of posts about this problem but so far none of the solutions have worked for me.

I have a duplicate install of a live site on a subdomain (same server as the live site, separate db) which was working fine, then for some reason the site pages are now blank though the back-end (Manager) is fine. I can login, make edits etc. but when previewing from within MODX or manually typing the url, the pages are blank. Aside from being installed on a subdomain, everything is identical. I've deleted/reinstalled both the Revo install and the db and deleted the contents of the cache directory to no avail. It's probably something simple but I can't see it.

Revo 2.2.6
Linux/Apache

Did this happen when you turned on Friendly URLs or was the site ever on a temporary (~sitename) domain?

What you're seeing most often has to do with the .htaccess file, since that's often bypassed in the Manager. Sometimes hosts mess with the .htaccess file and some hosts actually mess with the way the domain name is processed without telling you.

This usually indicates a fatal PHP error somewhere. Check the Manager's error log, and if possible take a look at your server logs as well.

You can also try deleting all the folders under the core/cache folder, as well as making sure to clear your browser's cache and the cookies for the domain.

Susan's point is a good one. The PHP error is usually in a Plugin -- often a PHP warning caused by a PHP upgrade. You can disable plugins one by one to see which one it is.

If you can fix it by changing the PHP error reporting level to not give E_NOTICE errors, that's definitely the problem.

Quote from: BobRay at Jan 06, 2013, 10:41 PM

Did this happen when you turned on Friendly URLs or was the site ever on a temporary (~sitename) domain?

FURLs was always on. Apart from upgrading to 2.2.6 nothing else was changed by me prior to the problem, it had been working fine on a subdomain for months. It was never on a temp. domain.

Then it's very likely a problem with a plugin as Susan suggested unless the .htaccess file has changed.

Sometimes there's a clue to which plugin it is in the MODX error log.

Nothing may have been changed by you, but hosting providers very often upgrade their PHP, MySQL, security application settings, or other server-side configurations without any warning.

Quote from: BobRay at Jan 06, 2013, 11:02 PM

Then it's very likely a problem with a plugin as Susan suggested unless the .htaccess file has changed.

The error log is blank. All plugins were disabled but nothing changed. And I don't know how to change PHP error reporting to not give E_NOTICE errors.

Quote from: sottwell at Jan 06, 2013, 11:08 PM

Nothing may have been changed by you, but hosting providers very often upgrade their PHP, MySQL, security application settings, or other server-side configurations without any warning.

If that were the problem then wouldn't it also affect the live site and not just the subdomain install? They are both part of the same hosting account/domain/server.

In a php.ini file in the MODX root (create one if it doesn't exist) add this line: