json return using soap server and soap client using php

How to get JSON response from SOAP Call in PHP
copy soap_server page like (index.php);
-----------------------------------------------------------------------
require_once('../lib/nusoap.php');

$server = new nusoap_server;

$server->configureWSDL('server', 'urn:server');

$server->wsdl->schemaTargetNamespace = 'urn:server';

$server->register('getrequest',
            array('name' => 'xsd:string'),       
            array('return' => 'xsd:string'),
            'urn:server',
            'urn:server#getrequest');

function getrequest($value,$address)
{
   $getval=array('name'=>$value,'address'=>$address);
  
   return json_encode($getval);
    
}

$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';

$server->service($HTTP_RAW_POST_DATA);
?>
------------------------------------------------------------------------------------
create soap client page (get json data form soap)getdata.php
----------------------------------------------------------------------------
require_once('../lib/nusoap.php');
$client = new soapclient('http://127.0.0.1/test/nusoap/samples/index.php?wsdl');

$res=$client->__call('getrequest',array('name'=>'bikash','address'=>'teliakan'));
if($client->fault)
   {
      echo "Fault: <p>Code: {$client->faultcode}<br>";
      echo "String: {$client->faultstring}";
   }
   else
   {
    echo $res;
   }