/* Failed attempts at a validation function
    function displayError($fieldName, $errormsg) {
        global $errorCount;
        echo "Error for \"$fieldName\": $errorMsg<br />\n";
        ++$errorCount;
    }

    function validateNumbers($data, $fieldName) {
        global $errorCount;
        if (empty($data)) {
            displayError($fieldName, "This field is required");
            $retval = "";
echo "empty";
        } else {
            $retval = trim($data);
            $retval = stripslashes($retval);
echo "working";
        }
        return($retval);
    }

     This was my attempt at an overtime calculation but it never worked
     if ($hours > 40) {
        $salary = ([$wage * 40] + [$hours - 40 * ($wage * 1.5)]);
        }
    */