How to make this WSDL file valid to be able to use with PHP SOAP extension?

//Code for the class
include_once('functions/errorHandler.php');
class Soap_PDA
{
	var $dbh;			// The database connection for this class
	var $dbh2;			// The database connection for this class
	var $error = '';	// Error messages returned stored in the class
	
	/******************************************************************************************************
	*	Class Constructor, creates a database connection
	*******************************************************************************************************/
	function Soap_PDA()
	{
		// Connect to the database
		include('includes/cosdb.conf');
		$this->dbh = $dbh;
		$this->dbh2 = $dbh2;
	}
	
	function authenticate_driver($driverNo, $password){
		return true;
	}
//this function stores the result from DB
	function storeResult($output_array, $result){
		$i = 0;
		while ($row = ifx_fetch_row($result)){
			while (list($key, $val) = each($row)){
				$output_array[$i][$key] = trim($val);
			}
			$i++;
		}
		return($output_array);
	}
 
	
	//This function will get a drivers package details so they can scan them in the WH
	function getParcels($driverNo, $password){
		//Authenticate driver
		if (!$this->authenticate_driver($driverNo, $password)){
			$this->error = "Authentication failed";
			return false;
		}
		$status = 200; //status for everything is OK
		$sql = "SELECT a.order_number,  
			a.backorder_suffix, 
			a.order_status, 
			a.driver_no,
			a.warehouse_code,
			b.packtype_id, 
			b.pklbl_type, 
			b.pklbl_stkcode, 
			b.pklbl_stkqty, 
			b.label_id  
			FROM sales_order a, so_pack_details b 
			WHERE a.order_status IN ('66', '76') 
			AND a.driver_no = '".$driverNo."' 
			AND (b.pklbl_scanbin = 'Y' OR b.pklbl_scanbin is null) 
			AND a.order_number = b.order_number 
			AND	a.backorder_suffix = b.backorder_suffix";
		
		$result = ifx_query($sql, $this->dbh);
		if (!$result) {
			$this->error = "Database Error: Unable to perform query (getParcels)";
			errorHandler("Soap_PDA.class.php $this->error", $sql, 3);
			$status = 500;
			return array($status, $result_array);
		}
		$result_array = $this->storeResult($result_array, $result);
		if ($result){
			ifx_free_result($result);
		}
return array($status, $result_array);				
	}//end function
}//end class
 
 
//code for the server
include_once('classes/Soap_PDA.class.php');
 
function getParcels($driver_no, $password){
	$Soap_PDA_OBJ = new Soap_PDA();
	list($status, $result) = $Soap_PDA_OBJ->getParcels($driver_no, $password);
	
	if ($status == 500){
		return new SoapFault("Server", $Soap_PDA_OBJ->error);
	}
	
	return array($status, $result);
}
 
ini_set("soap.wsdl_cache_enabled", "0"); // disabling WSDL cache
$server = new SoapServer("http://users.tpg.com.au/lymber//COS_PDA_WSDL.wsdl");
$server->addFunction(SOAP_FUNCTIONS_ALL);
$server->handle();