When I was a teenager I wrote my first "CMS" and was very proud. A few months later someone called my parents and asked for me. He said he was a developer and found some issues with security. He gave me a few tipps and suggested me some books and left for good. Never talked to hm again but this was so kind and I learned a lot about secure coding after that.
I wrote a "CMS" in college as a project in PHP (really hot then) so you could drag txt files and images into whatever directories and it would create web pages based on that. Professors were not impressed: "why you would want such thing, a MS Access would be better". I was disappointed, but hey, that's life.
I used PHP for so much stuff in the past. Really gave me a good start in large company but in school they teached us Microsoft FrontPage as the way to go tool for websites. Strange days. Hope you went on with your ideas and don't let anyone tell you otherwise.
