all that did was stop the code from being executed, since the form(s) are post method forms and the submitted data will be in $_POST, not $_GET.
if you haven't studied (class, book, online tutorial) any fundamentals of php programing, you won't be able to debug any problems in code, nor will you be able to understand and make use of any replies in help forums. what learning resources are you using to come up with this code?