Knowledge Base Contributions

Below is a list of the knowledge base entries that Mac Vee has contributed to:

• I did exactly from the book. It comes up as " Undefined variable." What's going on here?
  I still don't understand *why* I get "undefined variable"; I'm posting two variables from a form; th
  

• It gives me "Download file" box when I click submit. What should I do?
  My Apache2.0.39 and php4.2.3 cannot work well!