将字符串传递给$ _POST

Question

I have several radiobutton arrays. They're named awardLevel0[] , awardLevel1[] , awardLevel2[], and so on, generated dynamically by the user. I want to know if this function will work to get their total sum values.

function awardCheck () {
    $exist = true;
    $num = 0;
    $endsum = 0;
    while ($exist)
    {
        $names = "awardLevel" . $num;
        $awardLev = $_POST[$names];
        if (empty($awardLev)) {
            $exist = false;
            return $endsum;
        }
        else 
            $endsum = $endsum + $awardLev;
        $num++;
    }
    return $endsum;
}

When I run the code above, it gives me an error at $endsum = $endsum + $awardLev; saying i'm using unspported operand types. When I remove $awardLev, it runs without that error.

Is it possible to pass a variable containg a string to $_POST like

$postname = "awardLevel2";
$awardLev = $_POST[$postname];

Answer 1

Yes you can absolutely do that, but just a note:

With the [] syntax in the POST values, you get an array back rather than a string. You could use this to your advantage and even array_sum the _POST[awardLevel] values if you just drop the number, but I'm not sure if that would work for you.

I missed your syntax error (btw post any errors immediately next time).

Since awardLev is an array, you can only use + with another array, not with an integer. Just use

$endsum += $awardLev[0]

instead. OR if you are expecting multiple values per awardLev:

$endsum += array_sum($awardLev);