Description:
------------
see the test script. 

inside the foreach-loop the call of e.g. $nodes->asXml() will reset the iteration 
to the beginning and therefore the loop will forever remain on the second element.

this may be related to bug #50670 and #51846

greets, karl

Test script:
---------------
$xmlString = "<root><a><b>1</b><b>2</b><b>3</b></a></root>";
$xml = simplexml_load_string($xmlString);

$nodes = $xml->a->b;
foreach ($nodes as $nodeData) {
    echo "nodeData: " . $nodeData . "\n";

    //the following code will break the iteration on the second element and resets the pointer
    //happens by any of these methods
    $xml = $nodes->asXml();
    //$nodes->getName();
    //$nodes->attributes();
    //$nodes->children();
    //$nodes->getNamespaces();
    //iteration_breaker($nodes);
}

Expected result:
----------------
nodeData: 1
nodeData: 2
nodeData: 3


Actual result:
--------------
nodeData: 1
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
nodeData: 2
and so on...