Mine

<?xml version="1.0"?><embSession>  <version>0.1a</version>  <session id="098f6bcd4621d373cade4e832627b4f6">    <expire>1180290932</expire>  </session>  <session id="313204b96d1e3fd6afd53fd505ccd89b">    <expire>1180287352</expire>  </session>  <session id="de45dd68ff2e620721c0ac1fb80c4449">    <expire>1180288332</expire>  </session>  <session id="ae72587214858c37e60e43e61090e83a">    <expire>1180287392</expire>  </session></embSession>$xml = simplexml_load_file('session.xml');foreach($xml->session as $session)   {    foreach($session->expire as $expire)     {      if($expire < time())       {        unset($xml->session);        $xml->asXML('session.xml');      }    }  }