I have this XML:

```
<InternalData>
    <DataSet>
        <Table>
            <Expire_x0>2050-12-12T00:00:00+02:00</Expire_x0>
        </Table>
    </DataSet>
</InternalData>

```

How do I get the value of the `<Expire_x0>` tag?
I tried this:

```
$result = $s->__call("XmlString",array($params));
$obj_pros = get_object_vars($result);
$xml =  $obj_pros['XmlStringResult'];
$xml =  simplexml_load_string($xml);
$x = $xml->getElementsByTagName("Expire_x0");
echo $x;

```

without success. What is wrong?