<?php

$xml = '<xml>
<status>0</status>
<error code="111">Error message text goes here.</error>
</xml>';


    $xml = simplexml_load_string($xml );

    echo '<pre>'; print_r($xml); echo '</pre>';

echo "error code" . $xml->error['code'];


?>

<pre>SimpleXMLElement Object
(
    [status] => 0
    [error] => Error message text goes here.
)
</pre>error code111