Posted by elessar on 05/24/05 13:16

Ashok napisał(a):
> Hi,
> I need a condition in update form where before the form is updated, I have
> to check if the value of a cell is empty or not. If it is not empty, an
> error is shown and if empty, it is updated.
> What I am doing wrong in the script ( $_POST['helper1_pos'] gets value from
> the form). It shows error even if the cell is empty.
>
> if (!is_null($_POST['helper1_pos'])) {
> echo "Sorry! Helper 1 position already volunteered.";
> exit;
> }
> else {
> //update
> }
>
> Thanks.
> Ashok.
>
>

Hi,

function is_null give true when $_POST['helper1_pos'] = NULL.
You must understand NULL is not ''.

use function empty()

if (empty($_POST['helper1_pos'])) {
echo "Sorry! Helper 1 position already volunteered.";
exit;
}
else {
//update
}

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