Ru running Apache or IIS .
Via Apache
AddType application/x-httpd-php .php3
AddType application/x-httpd-php3-source .phps
AddType application/x-httpd-php .php
AddType application/x-httpd-php3-source .phps
Might help ya start
then just make a file called infotest.php3
<?
phpinfo();
?>
when you browse to it you should see the status of your php install.