Array is not array in XML

First of all I'm sorry for my English.

My xml code part is here;

[390] => SimpleXMLElement Object
            (
                [code] => 484
                [barcode] => 9518
                [supplier_code] => 9518
                [name] => 9518 Bayan Kilot
                [cat1name] => Bayan Külot
                [cat1code] => 10
                [cat2name] => SimpleXMLElement Object
                    (
                    )

                [cat2code] => SimpleXMLElement Object
                    (
                    )

                [cat3name] => SimpleXMLElement Object
                    (
                    )

                [cat3code] => SimpleXMLElement Object
                    (
                    )

                [stock] => 39971
                [price_list] => 0,00
                [price_list_camping] => 13,50
                [currency] => TL
                [vat] => 8
                [brand] => Polat Yıldız
                [detail] => SimpleXMLElement Object
                    (
                    )

                [images] => SimpleXMLElement Object
                    (
                        [image] => http://ift.tt/1ECKLlF
                    )

                [bodies] => SimpleXMLElement Object
                    (
                        [body] => Array
                            (
                                [0] => 6 Adet -Battal
                                [1] => 6 Adet -Battal
                            )

                        [color_code] => Array
                            (
                                [0] => 840
                                [1] => 839
                            )

                        [stock] => Array
                            (
                                [0] => 19981
                                [1] => 19990
                            )

                    )

                [colors] => SimpleXMLElement Object
                    (
                        [color] => Array
                            (
                                [0] => KIRMIZI
                                [1] => SİYAH
                            )

                        [colorcode] => Array
                            (
                                [0] => 840
                                [1] => 839
                            )

                    )

            )

and my php code is here ;

$renkKodu = (int)$urun -> bodies -> color_code[$i];
if($renkKodu <= 0 || !$renkKodu){
    $ozellik_adi = $beden;
}else if($renkKodu > 0){
    if($urun -> colors -> color && $urun -> colors -> colorcode){
        $renkArray = $urun -> colors -> color;
        echo is_array($renkArray) ? 'Array' : 'Not array';
        $key = array_search($renkKodu, $urun -> colors -> colorcode);
    }else {
        $ozellik_adi = $beden;
    }
}

PHP returns 'Not array'. I cant understand this. I see array in xml, but php says it is not array. Please help me :(