Long-winded Introduction
It took me a couple of days to figure this out due to lack of decent tutorials and not enough confidence in my Linux skills to build programs from source. I think I have the hang of it now, and write this up with the intent on providing another, or the only, tutorial on setting up CentOS 5 with multiple instances of PHP using one Apache install. That being said, there are a number of good tutorials out there, just none of them explicitly for CentOS and some leave out some details that n00bs like me get confused about.
PHP4 and PHP5 on SuSE 10.1 – This was by far the most helpful of the tutorials. Even though it was written for SuSE, it works almost straight across for CentOS.
There is also a great list of instructions in the comments on the php.net site under installing PHP for Apache 2.0 on Unix systems (see http://www.php.net/manual/en/install.unix.apache2.php#90478).
I found this one after I wrote up this tutorial at http://cuadradevelopment.com. It’s a bit different, but should work as well.
There are basically two different ways I could have done this. 1- run a single instance of Apache, and run one instance of PHP as a module, and other installs as CGI. 2- run several instances of Apache, each with it’s own instance of PHP as a module. I chose to do the first method for no particular reason. Dreamhost has a post about the good and bad with running PHP as CGI.
So basically, the steps are: 1. Set up Apache and have PHP install as a module. 2. Configure and make another instance of PHP to run as CGI. 3. Add a virtual host to Apache running under a different port to access the PHP as CGI.
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