foreach loop in php get invalid argument supplied - php

Question

I get "Invalid argument supplied" when using the following code. I can successfully parse an ip address and port number but i dont know how to get more than one at a time. My foreach loop is not working. Any ideas?
$dom = new DOMDocument();
$dom->loadHTMLFile($url);
$xml = simplexml_import_dom($dom);
$dom_results = $xml->xpath("/html/body/div[#id='subpagebgtabs']/div[#id='container']/table[#id='listtable']");
$ip_address = $dom_results[0]->tr->td[1]->span;
$ip_post = $dom_results[0]->tr->td[2];
$address_parts = $ip_address.":".$ip_post;
foreach ($address_parts as $address_full){
echo $address_full . "<br>";
}
$Dom_Results Output
["tr"]=>
array(50) {
[0]=>
object(SimpleXMLElement)#5 (3) {
["#attributes"]=>
array(2) {
["class"]=>
string(0) ""
["rel"]=>
string(7) "9054676"
}
["comment"]=>
object(SimpleXMLElement)#56 (0) {
}
["td"]=>
array(8) {
[0]=>
object(SimpleXMLElement)#57 (2) {
["#attributes"]=>
array(2) {
["class"]=>
string(20) "leftborder timestamp"
["rel"]=>
string(10) "1309047901"
}
["span"]=>
string(10) "2 minutes"
}
[1]=>
object(SimpleXMLElement)#58 (1) {
["span"]=>
string(13) "122.72.10.201"
}
[2]=>
string(3) "80"

Answer 1

I think this is what you're looking for:
// If results are found
if ( ! empty($dom_results) )
// Loop through each result. Based on your XPath query, the $dom_results
// contains tables. This loops through the rows of the first table.
foreach ( $dom_results[0]->tr as $row )
{
$ip_address = $row->td[1]->span;
$ip_post = $row->td[2];
// Output the address
echo $ip_address . ":" . $ip_post . "<br />";
}

Answer 2

it seems you want to extract all the ip address and port numbers and concatenate it like
ipaddress:port
So try this
foreach($dom_results as $dom) {
$ip = $dom->tr->td[1]->span;
$port = $dom->tr->td[2];
$address = $ip . ":". $port;
echo $address . "<br />";
}