$url = "https://merchant.roboxchange.com/WebService/Service.asmx/CalcOutSumm?MerchantLogin=d emo&IncCurrLabel=BANKOCEAN2R&IncSum=16582";
$text = file_get_contents($url);
preg_match("/OutSum>(.*)<\/OutSum/", $text, $new_OutSum);
preg_match("/Code>(.*)<\/Code/", $text, $code);
echo '<pre>';
print_r($code);
print_r($new_OutSum);
echo '</pre>';
Результат выполнения
Array
(
[0] => Code>0 0
)
Array
(
[0] => OutSum>16582.000000 16582.000000
)
ответ по ссылке следующий
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<CalcSummsResponseData xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://merchant.roboxchange.com/WebService/">
<Result>
<Code>0</Code>
</Result>
<OutSum>16582.000000</OutSum>
</CalcSummsResponseData>