[Resolved] Dynamically Assigning Sort Constant in array_multisort

[jalperin]

I'm trying to change the sort order dynamically based upon the value of a $_GET variable:

$sortorder = ($_GET['order'] == "asc") ? "SORT_ASC" : "SORT_DESC";

array_multisort($email, $sortorder, $result);

But when I do this, I get an error message that PHP is expecting a constant as the second argument in the array_multisort. Why won't it interpret the $sortorder variable as a constant? Is there some other way to accomplish this?

Thanks.

--Jeff

[paulnaj]

Hi jeff,

Two possibilities, try losing the double-quotes about each of the constants ...

$sortorder = ($_GET['order'] == "asc") ? SORT_ASC : SORT_DESC; 

array_multisort($email, $sortorder, $result);

Alternatively ...

if($_GET['order'] == "asc"){
	array_multisort($email, SORT_ASC, $result);
} else {
	array_multisort($email, SORT_DESC; $result);
}

Paul 🙂

[jalperin]

I had already tried the second approach (which works fine), but the first one is what I was really looking for -- and it seems to work also. Many thanks.