Also create a seperate file and copy this in:
<?php
phpinfo();
?>
That will load everything about your current PHP setup. If it doesn't load everything view the source if you just see that line then its not being complied before being sent to the browser, which it should be.
Please note do not share this URL and delete after use it is not information you want people to read. Again if nothing loads then its a Server problem.
The simple test to make sure it is not is to write the most basic echo statement:
<?php
echo "Work god darn you";?>
If that doesn't out put work god darn you to the browser, but is viewable in the source its defo a problem with the server. The strange thing is you are not even getting 500 errors which is what I would expect to see - Server does not compute error