syntax error in case 'remove' when decrementing [closed]

Answer 1

// Syntactical Errors, Find the corrected code!!

  switch($action)
  {
case "add":
    if (isset($_SESSION['cart'][$id])) {
        $_SESSION['cart'][$id]++;
    }
    else {
          $_SESSION['cart'][$id]=1;
     }
    break;

case "remove":
    if (isset($_SESSION['cart'][$id])) {
            $_SESSION['cart'][$id]--; //(ERROR HERE)
        }
        if ($_SESSION['cart'][$id]==0) {
            unset($_SESSION['cart'][$id]);
        }
    break;

case "empty":
    unset($_SESSION['cart']);
    break;

  }