PHP getName() 函数

<?php  
$xml=<<<XML
<?xml version="1.0" standalone="yes"?>  
<cars>  
<car id="1">Volvo</car>  
<car id="2">BMW</car>  
<car id="3">Saab</car>  
</cars>  
XML;  

$sxe=new SimpleXMLElement($xml);  
echo $sxe->getName() . "<br>";  
foreach ($sxe->children() as $child)  
{  
echo $child->getName() . "<br>";  
}  
?>

getName();