ah effectivement les deux marche, mais peux tu me dire pourquoi favoriser le foreach ?
Parce que c'est fait que pour les tableau?
Merci

foreach($result as $node))
{
    echo $node,"\n";
}

libxml_use_internal_errors(true);
$xml          = simplexml_load_string($data); //good
$result       = $xml->xpath('//friendsList/friends/friend');
while(list( , $node) = each($result)) {
    echo $node,"\n";
}

J'ai utilié * pour séléctionner tous les enfants.

$doc     = new DOMDocument();
$doc->loadXML('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<friendsList>
  <steamID64>76561197984780389</steamID64>
  <steamID>
    <![CDATA[3P SLK[L] ;g00dByMyL0ver]]></steamID>
    <friends>
      <friend>76561198004593774</friend></friends>
  </friendsList>');
$xpath   = new DOMXPath($doc);
echo "<pre>";
$url = $xpath->query('//friendsList/friends/friend')->item(0)->nodeValue;
echo $url;
echo "</pre>";

$url = $xpath->query('//friendsList/friends/friend');

foreach($url as $friend)
{
	echo $friend->nodeValue . "\n";
}

$doc     = new DOMDocument();
$doc->loadXML($page_friends);
$xpath   = new DOMXPath($doc);
echo "<pre>";
$url = $xpath->query('//friendsList/friends/friend')->item(0)->value;
echo $url;
echo "</pre>";

$xpath->query('//friendsList/friends/friend*')->item(0)->value();

1.<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2.<friendsList>
3.  <steamID64>xxxxxxxxxxx</steamID64>
4.  <steamID>
5.     <![CDATA xxxxxx  ]></steamID>
6.    <friends>
7.        <friend>xxxxxx</friend>
8.        <friend>xxxxxx</friend>
9.        <friend>xxxxxx</friend>
10.       <friend>xxxxxx</friend>
11.       <friend>xxxxxx</friend>
12.    </friends>
13.  </friendsList>

$url     = $xpath->query('//friendsList/friends/friend*')->item(0)->value();
echo $url;

$dom = new DOMDocument;
$dom->loadXML('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<friendsList>
  <steamID64>76561197984780389</steamID64>
  <steamID>
    <![CDATA[3P SLK[L] ;g00dByMyL0ver]]></steamID>
    <friends>
      <friend>76561198004593774</friend></friends>
  </friendsList>'); 
$s = simplexml_import_dom($dom);
echo $s->friends[0]->friend;

$dom->loadXML('$data_string')