sebgates/gist:e770d2247b0bd41eb7f2e3869bc14beb

## gistfile1.txt
<?php
if (empty($_POST)){
   header("location:index.php");   #redirect to the index page
}
//get the data from the form
$product_description = $_POST["product_description"];
$list_price = $_POST["list_price"];
$discount_percent = $_POST["discount_percent"];
if (!is_numeric($list_price) || !is_numeric($discount_percent)) {
    if (!is_numeric($list_price)) {
        $error_message = "The list price must be a number!<br/>";
    }
    if (!is_numeric($discount_percent)) {
        $error_message = "The discount percent must be a number!<br/>";
    }
    header("location:index.php?error_message=".$error_message);   #redirect to the index page
}

define('percentage', .01);
// print constant('percentage');

//calculate the discount and discounted price
$discount = $list_price * $discount_percent * constant('percentage');
$discount_price = $list_price - $discount;

//apply currency formatting
$list_price_f = "&euro;".number_format($list_price,2);
$discount_percent_f = number_format($discount_percent)."%";
$discount_f = "&euro;".number_format($discount,2);
$discount_price_f = "&euro;".number_format($discount_price,2);
?>
<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style>
            #error {
                color: red;
                font-weight: bold;
            }
            label {
                display: inline-block;
                width: 150px;
                font-weight: bold;
            }
        </style>
    </head>
    <body>
        <!-- date formats available at: http://php.net/manual/en/function.date.php

        Below is "This quote is valid from Wednesday 28th September, 2016" -->
        <p>This quote is valid from <?php echo date('l jS F, Y'); ?></p>
        <label>Product Description:</label>
        <span><?php echo $product_description; ?></span><br/>
        <label>List Price:</label>
        <span><?php echo $list_price_f; ?></span><br/>
        <label>Discount Percentage:</label>
        <span><?php echo $discount_percent_f; ?></span><br/>
        <label>Discount Amount:</label>
        <span><?php echo $discount_f; ?></span><br/>
        <label>Discount Price:</label>
        <span><?php echo $discount_price_f; ?></span><br/>
    </body>
</html>
	<?php
	if (empty($_POST)){
	header("location:index.php"); #redirect to the index page
	}
	//get the data from the form
	$product_description = $_POST["product_description"];
	$list_price = $_POST["list_price"];
	$discount_percent = $_POST["discount_percent"];
	if (!is_numeric($list_price) \|\| !is_numeric($discount_percent)) {
	if (!is_numeric($list_price)) {
	$error_message = "The list price must be a number!<br/>";
	}
	if (!is_numeric($discount_percent)) {
	$error_message = "The discount percent must be a number!<br/>";
	}
	header("location:index.php?error_message=".$error_message); #redirect to the index page
	}

	define('percentage', .01);
	// print constant('percentage');

	//calculate the discount and discounted price
	$discount = $list_price * $discount_percent * constant('percentage');
	$discount_price = $list_price - $discount;

	//apply currency formatting
	$list_price_f = "€".number_format($list_price,2);
	$discount_percent_f = number_format($discount_percent)."%";
	$discount_f = "€".number_format($discount,2);
	$discount_price_f = "€".number_format($discount_price,2);
	?>
	<!DOCTYPE html>
	<!--
	To change this license header, choose License Headers in Project Properties.
	To change this template file, choose Tools \| Templates
	and open the template in the editor.
	-->
	<html>
	<head>
	<meta charset="UTF-8">
	<title></title>
	<style>
	#error {
	color: red;
	font-weight: bold;
	}
	label {
	display: inline-block;
	width: 150px;
	font-weight: bold;
	}
	</style>
	</head>
	<body>
	<!-- date formats available at: http://php.net/manual/en/function.date.php

	Below is "This quote is valid from Wednesday 28th September, 2016" -->
	<p>This quote is valid from <?php echo date('l jS F, Y'); ?></p>
	<label>Product Description:</label>
	<span><?php echo $product_description; ?></span><br/>
	<label>List Price:</label>
	<span><?php echo $list_price_f; ?></span><br/>
	<label>Discount Percentage:</label>
	<span><?php echo $discount_percent_f; ?></span><br/>
	<label>Discount Amount:</label>
	<span><?php echo $discount_f; ?></span><br/>
	<label>Discount Price:</label>
	<span><?php echo $discount_price_f; ?></span><br/>
	</body>
	</html>