PHP Installation problem - httpd.conf issue?

Hi there, I recently upgraded from PHP version 4.0-ish to 4.2.3 on my Linux/Apache machine. AFAIK, Apache is setup correctly (it serves HTML) and PHP works, but only from the command line. If I type "php -q php.php > test.html" the output of phpinfo() is stored in test.html. When I try and look at test.html running on localhost it display sfine, but when I try and view php.php, as "save as" window pops up. I am not too familar with Linux. If it was a Windows installation then I would make sure the Action application (path to php.exe) line was correct, but I can't find this in the Linux httpd.conf. Does this issue sound familar to anyone. Could anyone point me in the right direction? Thanks very much. - Best regards, Lee Reilly