I have some additional troubleshooting tips for 53.7, which deals with getting a blank screen on your browser when running a PHP script.
In addition to server misconfiguration, it may also be that PHP isn't configured to output errors to the browser, which is the case if you or your host uses a more secure php.ini. If this is the case, you need to find out where errors are being logged to find out if any errors are preventing normal output from being delivered to the client.
If you have access to php.ini, check the 'display_errors' directive, which is, by default, located under the 'error_reporting' directive. It's helpful to have 'display_errors' on during debugging phases, but best to have it off in production environments.
Related functions: http://php.net/ini_set | http://php.net/error_reporting | http://php.net/error_log