Merhaba piyasada bulunan kodlar ile kargolanmış siparişlerin listesini alıyorum. Fakat incelediğimden anladığım tek siparişte birden fazla ürün siparişi olduğunda hata mesajı ile karşılaşıyorum.

Örnek kod:
$say=count($DetailedOrderList->orderList->order);
echo "<table border='1' cellpadding='5' cellspacing='0'>";
for($i = 0; $i < $say; $i++ )
{
    echo "<tr>";
    echo "<td><table border='1' cellpadding='5' cellspacing='0' width='100%'><tbody>";
    echo "<tr><th>ID:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->id;
    echo "</td></tr>";
    echo "<tr><th>Sipariş No:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->orderNumber;
    echo "</td></tr>";
    echo "<tr>";
    echo "<th>Ürün Adı:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->orderItemList->orderItem->productName;
    echo "</td></tr>";
    echo "<tr><th>Sipariş Tarih:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->createDate;
    echo "</td></tr>";  echo "<tr><th>Sipariş Tutar:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->totalAmount."TL";
    echo "</td></tr>";
echo "</td></tr>";
echo "<tr>";
echo "<th>Ürün Detay:</th><td><a href='urundetay.php?id=".($DetailedOrderList->orderList->order[$i]->orderItemList->orderItem->productSellerCode)."'>";
echo $DetailedOrderList->orderList->order[$i]->orderItemList->orderItem->productName;
echo "</a> x ".$DetailedOrderList->orderList->order[$i]->orderItemList->orderItem->quantity."</td></tr>";
    echo "<tr><th>Detaylar:</th><td colspan='2'>";
    echo "<a href='siparisdetay.php?sip=".($DetailedOrderList->orderList->order[$i]->id)."'>Sipariş Detayı</a>";
    echo "</td></tr>";
    echo "</tbody></table></td>";
}
echo "</table>";
?>
var_dump ile direk çıktı aldığımda tek adetli siparişteki çıktı

["orderList"]=> object(stdClass)#5 (1)
{
["order"]=> array(14)
{
[0]=> object(stdClass)#6 (8)
{
["id"]=> int(180492925)
["status"]=> int(2)
["orderNumber"]=> string(12) "208553775281"
["totalAmount"]=> string(2) "75"
["paymentType"]=> int(1)
["citizenshipId"]=> string(11) "11627827970"
["orderItemList"]=> object(stdClass)#7 (1)
{
["orderItem"]=> object(stdClass)#8 (15)
{
["id"]=> int(125720803)
["productSellerCode"]=> string(6) "mfp50d"
["price"]=> string(2) "75"
["sellerDiscount"]=> string(1) "0"
["mallDiscount"]=> string(1) "0"
["commission"]=> string(5) "11.25"
["status"]=> int(6)
["quantity"]=> int(1)
["productName"]=> string(64) "Maria Fla-Pen Shallow 85mm 12 gr Slow Sinking Maket Yem Renk 50D"
["deliveryFeeType"]=> int(1)
["dueAmount"]=> string(2) "75"
["shipmentInfo"]=> object(stdClass)#9 (6)
{
["shipmentCompany"]=> object(stdClass)#10 (3)
{
["id"]=> int(342)
["name"]=> string(9) "MNG Kargo"
["shortName"]=> string(2) "MN"
}
["trackingNumber"]=> string(12) "689126506231"
["shipmentCode"]=> int(117801229)
["campaignNumber"]=> string(15) "914101401218293"
["shipmentMethod"]=> string(1) "1"
["campaignNumberStatus"]=> int(1)
}

["attributes"]=> object(stdClass)#11 (0) { }
["customTextOptionValues"]=> object(stdClass)#12 (0) { }
["updatedDate"]=> string(16) "12/01/2019 16:44"
}
}
["createDate"]=> string(16) "12/01/2019 10:39"
}
}
}
Tek siparişte A Ürün B Ürün olduğunda
var_dump ile aldığım method çıktısı
[1]=> object(stdClass)#13 (8)
{
["id"]=> int(180505297)
["status"]=> int(2)
["orderNumber"]=> string(12) "202851175283"
["totalAmount"]=> string(3) "298"
["paymentType"]=> int(8)
["citizenshipId"]=> string(11) "14851264900"
["orderItemList"]=> object(stdClass)#14 (1)
{
["orderItem"]=> array(2)
{
[0]=> object(stdClass)#15 (15)
{
["id"]=> int(125738581)
["productSellerCode"]=> string(6) "981216"
["price"]=> string(3) "200"
["sellerDiscount"]=> string(1) "0"
["mallDiscount"]=> string(1) "0"
["commission"]=> string(2) "30"
["status"]=> int(6)
["quantity"]=> int(1)
["productName"]=> string(44) "Victorinox 0.7322.T2 Swisscard Lite Sapphire"
["deliveryFeeType"]=> int(5)
["dueAmount"]=> string(6) "183.22"
["shipmentInfo"]=> object(stdClass)#16 (6)
{
["shipmentCompany"]=> object(stdClass)#17 (3)
{
["id"]=> int(342)
["name"]=> string(9) "MNG Kargo"
["shortName"]=> string(2) "MN"
}
["trackingNumber"]=> string(12) "791428196641"
["shipmentCode"]=> int(117818634)
["campaignNumber"]=> string(15) "946701511246340"
["shipmentMethod"]=> string(1) "1"
["campaignNumberStatus"]=> int(1)
}
["attributes"]=> object(stdClass)#18 (0) { }
["customTextOptionValues"]=> object(stdClass)#19 (0) { }
["updatedDate"]=> string(16) "12/01/2019 16:44"
}
[1]=> object(stdClass)#20 (15)
{
["id"]=> int(125738580)
["productSellerCode"]=> string(6) "981149"
["price"]=> string(2) "98"
["sellerDiscount"]=> string(1) "0"
["mallDiscount"]=> string(1) "0"
["commission"]=> string(4) "14.7"
["status"]=> int(6)
["quantity"]=> int(1)
["productName"]=> string(32) "Victorinox 0.2503 Recruit Çakı"
["deliveryFeeType"]=> int(5)
["dueAmount"]=> string(5) "89.78"
["shipmentInfo"]=> object(stdClass)#21 (6)
{
["shipmentCompany"]=> object(stdClass)#22 (3)
{
["id"]=> int(342)
["name"]=> string(9) "MNG Kargo"
["shortName"]=> string(2) "MN"
}
["trackingNumber"]=> string(12) "791428196641"
["shipmentCode"]=> int(117818634)
["campaignNumber"]=> string(15) "946701511246340"
["shipmentMethod"]=> string(1) "1"
["campaignNumberStatus"]=> int(1)
}
["attributes"]=> object(stdClass)#23 (0) { }
["customTextOptionValues"]=> object(stdClass)#24 (0) { }
["updatedDate"]=> string(16) "12/01/2019 16:44"
}
}
}
["createDate"]=> string(16) "12/01/2019 13:50"
}
Çıktı bu şekilde geldiğinde
echo "<th>Ürün Adı:</th><td>";
    echo $DetailedOrderList->orderList->order[$i]->orderItemList->orderItem->productName;
Bu satırda hata alıyorum. Nasıl bir yol izlemeliyim. Konu hakkında tecrübeli arkadaşların yardımına ihtiyacım var.