why does the sizeof and count give incorrect array size?

[Synergic]

why do both these functions:


sizeof -- Alias of count()
count -- Count elements in an array, or properties in an object

give an array size of 1 even though there's nothing inside it?
I then add something to it and it gives me 1 still then 2. what is in index 0? i need to do some manipulation and have to check if an array is empty.

[Chetan]

Gives me 0 if empty, it dosent give me 1.
And if it is a variable then ofcource it gives 1.

[Synergic]

yeah but if i add something to the array it gives me 1. It's hard to tell if its really empty or not...

[AndyB]

The answer is in the manual - http://ca.php.net/manual/en/function.count.php

[quote]count() may return 0 for a variable that isn't set, but it may also return 0 for a variable that has been initialized with an empty array. Use isset() to test if a variable is set.[/quote]

[Synergic]

[code]
<? if (isset($_SESSION['cart']))
{
echo 'Array is set.';
} ?>

<?echo '<pre>';
  print_r( $_SESSION );
echo '</pre>';?>
[/code]

result:

[code]
Array is set

Array
(
    [cart] => ShoppingCartClass Object
        (
            [items] => Array
                (
                )

            [totalPrice] =>
        )

)
[/code]

what gives?  :-\

[Synergic]

ok fixed, the problem was 'cart' was an object i got confused with 'it' being an array. I accessed the array inside [i] cart [/i] which is [i] items [/i] and recieve a 0 :)