Anyway to open a PHP file and view its code in the browser?

How can I open a local PHP script and view its code to the browser? The Readfile() method appears to parse and execute the code. The Fopen() method appears to parse and then not execute the code, leaving a blank screen, or at the very least displaying any non-PHP text existing in the script. This is obviously rare question because I can't find any references on this list or on Usenet. Is there a trick to this? Or is it simply not possible. Much Thanks, Kevin Stone <Kevin@helpelf.com>