Invalid Argument foreach()

[Dillenger]

Hi I can't quite figure out what i'm doing wrong here, maybe an extra set of eyes can help me out, but I'm getting an error here, on the foreach statement:

$xmlstr2 = <<<XML
$match2[2]
XML;

$xml2 = simplexml_load_string($xmlstr2);

foreach ($xml2->Item as $node2) {

Here is the entire code...
And the error I get is Warning: Invalid argument supplied for foreach()

  <?
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
$base = 'http://webservices.amazon.ca/onca/xml';
$query_string = '';

$params = array( 
	'Service' 			=> 'AWSECommerceService',
    'AssociateTag'		=> 'dillenger-20',
	'SubscriptionId'	=> '06KH9GNG9M5G44EGJ702',
    'ResponseGroup'		=> 'BrowseNodeInfo',
    'Operation'			=> 'BrowseNodeLookup',
	'BrowseNodeId'		=> '952768',
	);

foreach ($params as $key => $value) { 
    $query_string .= "$key=" . urlencode($value) . "&";
}

$url = "$base?$query_string";

$xml = file_get_contents($url);
$matched = preg_match('/(.*?)<\/Request>(.*?)<\/BrowseNodes><\/BrowseNodeLookupResponse>/is', $xml, $match);

$xmlstr = <<<XML
$match[2]
XML;

$xml = simplexml_load_string($xmlstr);
foreach ($xml->Children->BrowseNode as $node) {
   	$id		= $node->BrowseNodeId;
   	$name	= $node->Name;

	$color = $colornumber % 2;

	echo "<li class=\"listitem$color\"><a href=\"?var1=$id\">$name</a></li>\n";

	$colornumber = $colornumber + 1;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

?>
</ul>
  </div>

  <div id="content">
<?
if (isset($_GET[var1])) {
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
$base = 'http://webservices.amazon.ca/onca/xml';
$query_string = '';


$params = array( 
	'Service' 			=> 'AWSECommerceService',
    'AssociateTag'		=> 'dillenger-20',
	'SubscriptionId'	=> '06KH9GNG9M5G44EGJ702',
    'ResponseGroup'		=> 'Medium',
	'SearchIndex'		=> 'DVD',
	'Sort'				=> 'titlerank',
	'Condition'			=> 'All',
	'Operation'			=> 'ItemSearch',
	'BrowseNode'		=> $_GET[var1]
	);

foreach ($params as $key => $value) { 
    $query_string .= "$key=" . urlencode($value) . "&";
}

$url2 = "$base?$query_string";

$xml2 = file_get_contents($url2);
$matched2 = preg_match('/(.*?)<\/Request>(.*?)<\/Items><\/ItemSearchResponse> <br \/>/is', $xml2, $match2);

$xmlstr2 = <<<XML
$match2[2]
XML;

$xml2 = simplexml_load_string($xmlstr2);

foreach ($xml2->Item as $node2) {
   	/*$ASIN		= $node2->ASIN;
   	$ListPrice	= $node2->ListPrice->FormattedPrice;
	$Title		= $node2->Title;
	$OurPrice	= $node2->LowestNewPrice->FormattedPrice;
	$ImageURL	= $node2->SmallImage->URL;

	$color = $colornumber % 2;

	echo "\n<div class=\"item$color\">\n<a href=\"?var2=$ASIN\"><img src=\"$ImageURL\" border=\"0\" alt=\"$Title\" class=\"image1\"></a>\n<a href=\"?var2=$ASIN\" class=\"productname1\">$Title</a>\nList Price:<span class=\"listprice1\">$ListPrice</span><br>\nOur Price:<span class=\"ourprice1\">$OurPrice</span>\n</div>\n";

	$colornumber = $colornumber + 1;*/
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}

?>

[kubis]

I got it working without any problem, although i have saved the xml first and then loaded in php from disk (can't access directly web from php bcos of proxy); check first if the response from webservice is correct AND the preg_match returns correct piece of xml.
the url i used is:
http://webservices.amazon.ca/onca/xml?Service=AWSECommerceService&AssociateTag=dillenger-20&SubscriptionId=06KH9GNG9M5G44EGJ702&ResponseGroup=BrowseNodeInfo&Operation=BrowseNodeLookup&BrowseNodeId=952768

[Dillenger]

Hmm strange,

Did you check the second query aswell? I had no problems with the browsenode query, it was the second one I had troubles with, where it's selecting the titles, based on the browser nodes...