gistfile1.php

class DellInfo extends \SoapClient {
   //const ADDR = 'http://xserv.dell.com/services/assetservice.asmx?WSDL';
   const ADDR = 'http://143.166.84.118/services/assetservice.asmx?WSDL';
   const GUID = 'F5EE89B0-5332-11E1-B47D-8E584824019B';

   function __construct($options = array()) {
      
      if (!isset($options['exceptions'])) {
         $options['exceptions'] = false;
      }
      $options['features'] = SOAP_SINGLE_ELEMENT_ARRAYS;
      parent::__construct(self::ADDR, $options);
   }
   
   function getInfo($tag) {
      $args = array(
         'guid'            => self::GUID,
         'applicationName' => 'GLPI',
         'serviceTags'     => $tag
      );
      $reponse = parent::__soapCall('GetAssetInformation', array($args));
         //print_r($reponse);

      if (is_soap_fault($reponse)) {
         return NULL;
      }
      return (isset($reponse->GetAssetInformationResult) ? $reponse->GetAssetInformationResult : NULL);
   }
}

gistfile2.php

  private function getWarranty()
	{
		$DellInfo = new DellInfo();
		$info = $DellInfo->getInfo($this->KSInfo["computerOEMSerial"]);
		if($info && isset($info->Asset))
		{
			$MaxDays = 0;
			foreach($info->Asset[0]->Entitlements->EntitlementData as $Entitlement)
			{
				if($Entitlement->DaysLeft > $MaxDays)
					$MaxDays = $Entitlement->DaysLeft;
			}
			$this->KSInfo["warranty"] = $MaxDays;
			$this->KSInfo["shipdate"] = date("n/d/Y",strtotime($info->Asset[0]->AssetHeaderData->SystemShipDate));
		} else {
			return false;
		}
	}