parsing a DOMNodeList in PHP - php

Question

A web service return Xml of format
<string>
<NewDataSet>
<DealBlotter>
<CustomerReference>161403239</CustomerReference>
<Symbol>EUR/USD</Symbol>
<BuySell>S</BuySell>
<ContractValue>-100000</ContractValue>
<Price>1.35070</Price>
<CounterValue>-135070</CounterValue>
<TradeDate>2011-01-20 22:05:21.690</TradeDate>
<ConfirmationNumber>78967117</ConfirmationNumber>
<Status>C</Status>
<lTID>111913820</lTID>
</DealBlotter>
</NewDataSet>
</string>
Now i am using curl to access this and then -
$xml = simplexml_load_string($result);
$dom = new DOMDOcument();
// Load your XML as a string
$dom->loadXML($xml);
// Create new XPath object
$xpath = new DOMXpath($dom);
$res = $xpath->query("/NewDataSet/DealBlotter");
foreach($res as $node)
{
print "i went inside foreach";
$custref = ($node->getElementsByTagName("CustomerReference")->item(0)->nodeValue);
print $custref;
$ccy = ($node->getElementsByTagName("Symbol")->item(0)->nodeValue);
print $ccy;
$type = ($node->getElementsByTagName("BuySell")->item(0)->nodeValue);
$lots = ($node->getElementsByTagName("ContractValue")->item(0)->nodeValue);
$price = ($node->getElementsByTagName("Price")->item(0)->nodeValue);
$confnumber = ($node->getElementsByTagName("ConfirmationNumber")->item(0)->nodeValue);
$status = ($node->getElementsByTagName("Status")->item(0)->nodeValue);
$ltid = ($node->getElementsByTagName("lTID")->item(0)->nodeValue);
$time = ($node->getElementsByTagName("TradeDate")->item(0)->nodeValue);
}
But nothing is getting printed. except the dummy statement.
using $res = $xpath->query("/string/NewDataSet/DealBlotter"); did not help. Also a print_r($res); gives output as DOMNodeList obect.
Doing this also does not print anything
$objDOM = new DOMDocument();
$objDOM->load($result);
$note = $objDOM->getElementsByTagName("DealBlotter");
foreach( $note as $value )
{
print "hello";
$tasks = $value->getElementsByTagName("Symbol");
$task = (string)$tasks->item(0)->nodeValue;
$details = $value->getElementsByTagName("Status");
$detail = (string)$details->item(0)->nodeValue;
print "$task :: $detail <br>";
}

Answer 1

There are a few problems.
With how you're loading the xml. Get rid of the simplexml line. It's not needed, and is messing things up. Instead just do $dom->loadXml($result);. There's no reason to load SimpleXML first if you're going to pass it directly into DomDocument.
With your query, the / operator is the direct decendent operator. So it means directly next to. So your first tag should be the root. So either add the root onto it:
$res = $xpath->query("/string/NewDataSet/DealBlotter");
Or make the leading slash into // which selects any matching decendent:
$res = $xpath->query("//NewDataSet/DealBlotter");
And finally, doing a var_dump on $res isn't going to tell you much. Instead, I like to do var_dump($res->length) since it'll tell you how many matches it has rather than that it's a domnodelist (which you already know)...