Can anyone explain me better the conpcept of the webservice. I'm using wamp for a school project, i'm creating an adress-book with JSON and AJAX. The Deitel's one if you have encounteered it before. I have the deitel's code and simply want to implement it in my website. It's requesting webserviceurl. The site i want to create is in php. I have attached the script and highlighted the things i don't understand.