Come faccio ad estrarre tutti gli id dei video da questo xml
http://gdata.youtube.com/feeds/api/v...results=10&v=2

Codice PHP:
<?php
function download_page($path){
        
$ch curl_init();
        
curl_setopt($chCURLOPT_URL,$path);
        
curl_setopt($chCURLOPT_FAILONERROR,1);
        
curl_setopt($chCURLOPT_FOLLOWLOCATION,1);
        
curl_setopt($chCURLOPT_RETURNTRANSFER,1);
        
curl_setopt($chCURLOPT_TIMEOUT15);
        
$retValue curl_exec($ch);                      
        
curl_close($ch);
        return 
$retValue;
}
$url='http://gdata.youtube.com/feeds/api/videos?q=football+-soccer&orderby=published&start-index=11&max-results=10&v=2';

$sXML download_page(url);
$oXML = new SimpleXMLElement($sXML);

//da qui in poi non so che fare
foreach($oXML->entry as $oEntry){
        echo 
$oEntry->id "\n";
}