process-order.php

<?php
  define('TIRE_PRICE', 100);
  define('OIL_PRICE', 50);
  define('SPARK_PRICE', 150);
?>

<?php
  require_once('view-comp/header.php');
 ?>

          <h1 class="card-title">Order Result</h1>
          <?php
            echo '<p>Order Processed at ';
            echo date('H:i, jS F Y');
            echo '</p>';


            $tireQty = $_POST['tireQty'] ? $_POST['tireQty'] : 0;
            $oilQty = $_POST['oilQty'] ? $_POST['oilQty'] : 0;
            $sparkQty = $_POST['sparkQty'] ? $_POST['sparkQty'] : 0;
            $find = $_POST['find'];

            switch($find){
              case 'regular':
                echo "Regular Customer<br/>";
                break;
              case 'tv':
                echo "TV Advertisement<br/>";
                break;
              case 'phone':
                echo "From Phone Directory<br/>";
                break;
              case 'mouth':
                echo "From word of mouth<br/>";
              default:
                echo "Unknown Customer<br/>";
            }

            echo '<p>Prices<br/>';
            echo 'Tires: '.TIRE_PRICE.'<br/>';
            echo 'Oil: '.OIL_PRICE.'<br/>';
            echo 'Sparkplugs: '.SPARK_PRICE.'<br/>';

            $totalQty = @($tireQty + $oilQty + $sparkQty);
            echo 'Total Quantity: '.$totalQty.'<br/>';


            //total = VAT + VATable
            // VAT = 0.12 * VATable
            //VATable = total/1.12

            if($totalQty == 0){
              echo 'You didn\'t order anything. <br/><br/>';
            }else{
              echo '<p>Your order is as follows</p>';
              if($tireQty)
                echo "$tireQty tires<br/>";
              if($oilQty)
                echo "$oilQty bottles of oil<br/>";
              if($sparkQty)
                echo "$sparkQty sparkplugs<br/><br/>";
            }

            $tireAmount = @($tireQty * TIRE_PRICE); 
            $oilAmount = @($oilQty * OIL_PRICE);
            $sparkAmount = @($sparkQty * SPARK_PRICE);

            $vatAble = (float)(($tireAmount + $oilAmount + $sparkAmount)/1.12);
            $vatAmount = (float)($vatAble * 0.12);

            $totalAmount = (float)($vatAble + $vatAmount);


            echo "<br/>VATable amount = ".$vatAble.'<br/>';
            echo "VAT amount = ".$vatAmount.'<br/>';
            echo "Total Amount = ".$totalAmount."<br/><br/>";

            $otherTotalAmount = &$totalAmount;
            $otherTotalAmount += $oilAmount;
            echo 'Other Total Amount:  '.$otherTotalAmount.'<br/>';
            $totalAmount +=$sparkAmount;
            echo 'Total Amount: '.$totalAmount.'<br/>';

            echo "Amount exceeded 500?".($totalAmount > 500 ? ' Yes' : ' No').'<br/><br/>';

          ?>

        </div>
        <div class="card-footer">
          <a class="btn btn-success" href="order-form.php"> Go Back </a>

<?php
   require_once('view-comp/footer.php');
?>