Pastebin is a debugging tool which allows developers to paste code on the Internet and get corrections by other people.
This is great if you are developing and talking to someone using AIM, MSN Messenger or Skype and you can’t paste code properly, and you haven’t got the syntax formatting.
When you’ve posted a code snippet and someone submits a correction, you are also able to see the corrections made, tracking changes and allowing you to learn from your mistakes.
In addition, PHP functions are linked up to the appropriate page on PHP.net. A magnificent Internet application and it’s without doubt great for group projects.