AHH.  The count() command does the trick.  Ron

-----Original Message-----
From: Ron Piggott <ron.pigg...@actsministries.org>
Reply-to: ron.pigg...@actsministries.org
To: Martin Scotta <martinsco...@gmail.com>, phps...@gmail.com
Cc: a...@ashleysheridan.co.uk, PHP General <php-general@lists.php.net>
Subject: Re: [PHP] Array
Date: Sat, 24 Oct 2009 11:43:12 -0400

The code I have so far for orders is below.  When a product hasn't been
added it does what I want it to --- in giving the message "Your shopping
cart is empty".  When a product is added, but then the user changes
their mind I use the following lines of code to remove the selection:


It still leaves the variable   $_SESSION['order']   as an array, even if
there are no selections in it.  The PHP command is_array is useless of
weed out when there are no products.

What I would like to have happen is if the shopping cart is empty then
the message "Your shopping cart is empty" be displayed 100% of the time.
How do I achieve this?  What changes to my code below need to happen?

if ( isset($_SESSION['order']) ) {
#customer has begun creating order

foreach ($_SESSION['order'] AS $key => $value ) { 
echo "Product: " . $key . " Quantity: " .
$_SESSION['order'][$key]['quantity'] . "<br>\r\n";

} else {
#no products selected

echo "<ul class=\"lists\">\r\n";
echo "<li>Your shopping cart is empty</li>\r\n";
echo "</ul>\r\n";


-----Original Message-----
From: Martin Scotta <martinsco...@gmail.com>
To: a...@ashleysheridan.co.uk
Cc: ron.pigg...@actsministries.org, PHP General
Subject: Re: [PHP] Array
Date: Sat, 24 Oct 2009 11:50:14 -0300

On Sat, Oct 24, 2009 at 7:59 AM, Ashley Sheridan
<a...@ashleysheridan.co.uk> wrote: 
        On Sat, 2009-10-24 at 06:57 -0400, Ron Piggott wrote:
        > The following line gives me an error message when there aren't
        > values in the array --- how do I accommodate this?
        > Warning: Invalid argument supplied for foreach()
        > foreach ($_SESSION['order'] AS $key => $value ) {
        Do an isset() on $_SESSION['order'] first to determine if the
        even exists, then do is_array() to determine if it's an array or
        before trying to iterate it. My guess is that $_SESSION['order']
        an array all the time.

foreach works with array and instances. 
Unless the class implements Transversable, it's public properties are
used on the loop.

foreach($object as $prop => $value )
//php translates the foreach into something like this...
foreach(get_object_vars($object) as $prop => $value )

Martin Scotta

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