php loop with add function fails in https [closed]

I need to loop through specific fields in a form, and get the total. It works perfectly but after I updated to https and it fails.

part code:

            foreach ($arr_sq as $value) {                if (empty($_POST[$value])) {                    $$value="0";                } else {                    $$value= $_POST[$value];                    $total1=$total1+$_POST[$value]; - here is where is fails                }            }

Any advice?

Thank you and regardsRichard