error in msg parsing:XML error parsing SOAP payload on line 1: Space required

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PHP

webservice

Hi all,

I am learning php.

I have created Web Service in php using nusoap. I have written a method for fetch database results, to return array it's returning error. I had tried to resolve the error, but it's still giving error.

Could you tell me where I went wrong.

my php code is:

//server.php

<?php

require_once("nuSOAP/lib/nusoap.php");
require_once("Classes/Connection.class.php");
require_once("Classes/Customer.class.php");


// create a new soap server
$server = new soap_server();
// configure our WSDL
$server->configureWSDL("CustomerLookup","urn:CustomerLookup");
$server ->register('GetAllCustomers', array('value' => 'xsd:string'), array('return' => 'xsd:string'), 'urn:server', 'urn:server# GetAllCustomers');
function GetAllCustomers()
{
	$database = new Connection();
			
	$result = $database->runQuery("SELECT * FROM customers");
	$num = mysql_num_rows($result);
	
	if($num == 0)
	{
		return "";
	}
	else
	{
		$tempArray = array();
		
		for($i=0;$i<$num;$i++)
		{
            $items [] = array( 'id'=>$row['id'],'phonenumber'=>$row['phonenumber'],'businessname'=>$row['businessname']);
		}
		return $items;
	}
}             
$POST_DATA = isset($GLOBALS['HTTP_RAW_POST_DATA']) ? $GLOBALS['HTTP_RAW_POST_DATA'] : '';
$server->service($POST_DATA);                
exit();
?>

//Client.php

<?php

require_once("nuSOAP/lib/nusoap.php");
$client = new nusoap_client("http://localhost:8080/myfiles/customerswebservice/Client.php?wsdl");

$response = $client ->call(' GetAllCustomers ');
if ($client->fault) {
	echo '<h2>Fault</h2>';
	print_r($response);} else {
	// Check for errors
	$err = $client->getError();
	if ($err) {
		// Display the error
		echo '<h2>Error</h2>' . $err';
	} else {
	   }
       }
//var_dump($response);

?>

my error is:

Fault Error:
Array
(
    [faultcode] => SOAP-ENV:Client
    [faultactor] => 
    [faultstring] => error in msg parsing:
XML error parsing SOAP payload on line 1: Space required
    [detail] => 
)

could you tell me where I went wrong?

thanks in advance.........