Question about php.ini

Hi, I hope we are all doing well today I'm very new to php. Here are some basic info about my server that I am running: Mac OS X 10.3.7 PHP 4.3.10 MySQL 4.0.18 Apache 1.3.33 What I want to do is host a forum on my web page. I can't seem to get it set up, and I notice that I do not have a "php.ini" file in my /etc directory (This is the Configuration File Path). However, I do have a "php.ini.default" in the same directory. I seem to have two options: 1.) rename the "php.ini.default" to plain "php.ini" and see if that resolves it. However, I'm not sure what kind of tests can I perform to see that it is working properly? 2.) or I can follow this tutorial at: "http://www.dmcinsights.com/phpmysql/phpini.php" which teaches me how to make my own "php.ini" file. Is there any other recommendations/comments that you all have? Thanks so much in advance everyone, I'm new to this mailing list. -- S. Wong