获取未定义的索引错误[重复]

Question

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• “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP 28 answers

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

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

 ?>

</div>

Answer 1

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

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