Resolved Arrays & Displaying Messages

[Jodzzz]

Hi Guys,

I'm doing a paypal discount coupon thing. Its all working fine there's just one thing I'm missing.

If a code is entered which isn't in the array, i want it to post a message saying "The code you entered was incorrect"

Simple as that!

Here's the code

<?php

header('Cache-Control: no-cache, no-store, must-revalidate'); // HTTP 1.1.
header('Pragma: no-cache'); // HTTP 1.0.
header('Expires: 0'); // Proxies.

$hostedButtonId = "FVSQDMQQC3K3N";
$amount = 10.99;

$arr = array(
"MFM" => array("hostedButtonId" => "S42XZMR6QW8VJ", "discount" => "1.10"),
"BU10KZ" => array("hostedButtonId" => "SCS9JZBDFUW4Q", "discount" => "1.10"),
"XZ10D2" => array("hostedButtonId" => "C9LK8DMEX3AJ6", "discount" => "1.10"),
"BP15D3" => array("hostedButtonId" => "EJENJCYB6TEQ4", "discount" => "1.65");

	foreach ($arr as $key => $value) {
	
		if ($key == $_POST["couponCode"])
		{
			$hostedButtonId = $value["hostedButtonId"];
			$discount = $value["discount"];
			$amount = ($amount - $discount);
			break;
		}
	}

	
?>

and

<form action="buy-now.php" method="post" >
   	 	<input type="text" size="6" name="couponCode"  placeholder="enter code" style="margin-bottom:10px;" >
    	<input type="submit" name="submitCouponCode" value="Apply Discount">
    </form>
	
    
							 <form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
        <input type="hidden" name="cmd" value="_s-xclick">
        <input type="hidden" name="hosted_button_id" value="<?php echo  $hostedButtonId; ?>">
        <input type="image" src="http://www.beltupkidz.com/img-bin/buy-now-blue.jpg" border="0" name="submit" alt="PayPal — The safer, easier way to pay online.">
<img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">
</form>
<h3>&pound;<?php echo  $amount; ?></h3>

Thanks!

[Fou-Lu]

You don't need to loop at all to do this. A simple isset check will work:

PHP Code:

if (!isset($arr[$_POST['couponCode']]))
{
    printf('%s is not a valid code.', $_POST['couponCode']);
}
else
{
    $discount = $arr[$_POST['couponCode']];
    $amount -= $discount['discount'];
} 


[Jodzzz]

Where would i put that in my code?

where i wanted the error message to be displayed?

[Jodzzz]

i've put it in but it displays is not a valid code all the time, how would i have that completly hidden?

[Fou-Lu]

It would replace your foreach.

[Jodzzz]

i don't understand, sorry.

http://client4.cnxdevserver.co.uk/be...dz/buy-now.php

if you look at that you will see what i mean.

[Jodzzz]

Also could i have it say? your discountwas applyed if they entered a correct code?

[Fou-Lu]

Yeah you simply add that in the else:

PHP Code:

if (!isset($arr[$_POST['couponCode']]))
{
    printf('%s is not a valid code.', $_POST['couponCode']);
}
else
{
    $discount = $arr[$_POST['couponCode']];
    $amount -= $discount['discount'];
    print('The discount has been applied');
} 


I assumed as well that this is a part of the same page. $amount will only carry worth if it is located somewhere below where the $amount is subtracted from. Given that this is in HTML, you'll want to simply wrap the output from the prints into a div or paragraph tag so you can shape it with the rest of the output.
[/php]

[Jodzzz]

One last thing, how do i go about hiding "is not a valid code" untill an invalid code is entered?, at the moment its displaying all the time

[Fou-Lu]

Oh yeah I guess you need to check that its been posted first.

PHP Code:

if (isset($_POST['couponCode']))
{
    if (!isset($arr[$_POST['couponCode']]))
    {
        printf('%s is not a valid code.', $_POST['couponCode']);
    }
    else
    {
        $discount = $arr[$_POST['couponCode']];
        $amount -= $discount['discount'];
        print('The discount has been applied');
    } 
} 


[Jodzzz]

Thanks alot man all sorted!