Edit: basically says the same as above, however if you are getting a blank screen and none of your die(...) messages are output, it is likely you have a fatal parse error and you will only see these due to settings made in a .htaccess file (or checking your web server log for errors.)
You can put the following lines in a .htaccess file -
Unfortunately, a .htaccess file does not have access to any of the PHP defined constants, like E_ALL, so you must use the corresponding value for the error reporting level you want to set.