I've added the AddType lines for both older and new PHP file extensions to httpd.conf, but that doesn't work either. I'd rather not install PHP3 to run alongside PHP4 either, since that seems ...

(You can use phpinfo(); to see what extensions are available in your PHP setup. If you don't have curl, but you're willing to edit some code, there is a workaround.) ...

Learn how to troubleshoot Apache 2 when it's not executing PHP files with this easy-to-follow, step-by-step tutorial.