Cant write code in button click

[Ammu]

hi
I have a button in my page. I want to write some codes inside that. I use so many methods but shows errors. i have use

if($_GET['submit']!='')
and
if ($submit)
and
if($_GET['submit']
 

showing errors like
Notice: Undefined index: submit in C:/....
can anybody help to solve this problem?

[Dormilich]

when you load the page for the first time, you certain have not made a submit, hence the value does not exists and that is the error you get. you need to test, whether the key exists before you can use it.

if (isset($_GET['submit']))
{
    // there was a submit element
}

note that the submit button is not submitted by every browser (e.g. IE)

[Ammu]

Thank you Dormilich.My problem is solved.