Paring XML loaded by file_get_contents() - php

Question

I have some simple XML parser
$doc = new DOMDocument();
$doc->load("xml/UploadTask.xml");
$items = $doc->getElementsByTagName( "item" );
foreach( $items as $item )
{
$keys = $item->getElementsByTagName( "key" );
$key = $keys->item(0)->nodeValue;
$values = $item->getElementsByTagName( "value" );
$value = $values->item(0)->nodeValue;
echo "$key - $value";
}
and it work perfectly for me, how ever if i need to parse XML which comes via POST, my code to load XML looks like (I put it on top of file):
$xml = file_get_contents('php://input');
echo $xml;
and this return XML which comes, everything works right , how ever if I load $xml to DOM (basicly replace 2. line on $doc->load($xml);I'm getting no output, no echo of values.
while I try to debug this I notice that if I use file var_dump($items)
i get answer:
object(DOMNodeList)#2 (1) {
["length"]=>
int(0)
}
if I do same var_dump() with file loaded i get answer:
object(DOMNodeList)#2 (1) {
["length"]=>
int(2)
}
where int(2) represent number of matches for this criteria found.
So my question is are there some limits for parsing XML loading with file_get_contents ?
and also, is there any workaround on this?
Thanks guys.

Answer 1

DOMDocument::load() loads a file (or an URL using the Streamwrappers), not a string. DOMDocument::loadXml() loads a string.
$xml = '<foo>Hello World</foo>';
$document = new DOMDocument();
$document->loadXml($xml);
var_dump($document->documentElement->textContent);
Output:
string(11) "Hello World"