Getting Undefined index error

Question

Im getting the following error: Notice:undefined index:done please advise what is wrong

 <?php
        if($_Get['done']==1 $msg = "Account details saved";

 ?>

Answer 1

Check first if the key exists, then the comparison to 1.

if (isset($_GET['done']) && $_GET['done'] == 1) {
    $msg = '...';
}