Question

I have the following array that I want to count the element of “PaymentType” == paypal. I am using this method
$totalcount = count(array_filter((array) $data[0], 'paypal'));
but get the warning “‘paypal’, should be a valid callback”
Appreciate any response to help me get going in the right direction.

Array
(
[0] => Array
    (
        [TransactionDate] => 0000-00-00 00:00:00
        [TotalAmount] => 0.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 92
        [PaymentType] => paypal
    )

[1] => Array
    (
        [TransactionDate] => 0000-00-00 00:00:00
        [TotalAmount] => 0.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 3
        [PaymentType] => paypal
    )

[2] => Array
    (
        [TransactionDate] => 2011-05-16 11:15:02
        [TotalAmount] => 75.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 2
        [PaymentType] => paypal
    )
)

Answer 1

array_filter() is supposed to return a filtered array (and also needs a callback function to work, not a search value) – you don’t need to do that. Here’s a solution that really only counts the matches:

$totalcount = 0;
for ($i = 0, $c = count($data[0]); $i < $c; $i++)
{
    if ($data[0][$i]['PaymentType'] === 'paypal')
        $totalcount++;
}