I am a php programmer with a decade of experience building websites in php. I built a php website, running on a Linux server, for a client who has recently created a SF account, and wants me to integrate my website with SF. So for example, when someone signs up on the website I built, they would be added as a contact in her SF account. But I'm having huge difficulties understanding the SF developers documentation. I am seeking some "Hello World" examples so that I can get some small scripts working, and from there, hopefully I could be on my way. I'd be eternally grateful for assistance on this.