I have a mediawiki install that is acting up. Whenever I try to save an article, it goes to a blank screen. All though if I refresh that blank screen, it will go on to work.
I have no idea why it's doing that, but it seems to be that it's a problem with PHP. I guess by default errors don't get logged when using mod_fcgid, because I can't find an error log anywhere. I tried enabling logging in the /etc/php5/cgi/php.ini, but that didn't do anything. How do I achieve php error logging? I'm using ubuntu 9.10.
The solution was to change the debug settings in the apache config from "warn" to "debug". Now apache outputs helpful error messages from PHP.