public function addLube()
{
require 'models/Stocks_model.php';
$prdName = $_POST['prd-name'];
$prdPrice = $_POST['prd-price'];
$prdQnty = $_POST['prd-qnty'];
$supplier = $_POST['supplier'];
$model = new Stocks_model();
if ($model->addLubricant($prdName, $prdPrice, $prdQnty, $supplier)) {
echo "Success";
} else {
echo "Nah";
}
}