PHP won't test.

I've looked through the discussions, but I can't find what I'm looking for.

I have a fresh install of RHEL 6.8 Desktop to which I've added MySQL. Now I've installed PHP to complete the LAMP stack. I assume the HTTP capabilities that were installed cover the Apache portion of the stack. I can start the httpd service without any problem.

My trouble is getting PHP to work with a simple phpinfo() command in a web page. It works on the command line, but not as part of a web page. Every time I try to open the page, Firefox asks me what I'd like to use to open it with. When I select 'firefox' it opens another page asking the same thing, ad nasuem.

I'm missing something, but I just don't know what it is.

I've been a sysadmin for years on Solaris, but it was always with the system configuration and maintenance end of things, never involved with software configuration. Can any suggest what I should be looking at on this issue?

Thanks