Could you explain this function in detail.....

Hi Jason I still getting the odd customer error on the ecart site I built I had sent up an email to send an error notification (the details are blank since the sessions arnt sent..but my main question is to find out what the below code does it detail as Im trying to work out why the customer order fails on the checkout page...I cannot reproduce the problem, so my only option is to learn more about the below snippet of code and try and work that way to capture any problems on the website: I beleive the snippet in question is the DO_itemized part as I dont know what that part details...

$WA_PP_ECO_SetResult = WA_PP_ECO_Set_Post($WA_PP_ECO_Set_params,$WA_PP_ECO_Do_itemized);
if ($WA_PP_ECO_SetResult->isError) {
if ("http://www.dinkyfingerprint.co.uk/failure.php" != "") {
header("Location: ". "http://www.dinkyfingerprint.co.uk/failure.php"); exit;
}
}
else {
$DinkyCart->redirStr = $WA_PP_ECO_SetResult->ECOServer;
}
}
?>




Best regards

Chris