This is the cleanest solution:

$client = new SoapClient( 'https://www.sandbox.paypal.com/wsdl/PayPalSvc.wsdl',
                           array( 'soap_version' => SOAP_1_1 ));

$cred = array( 'Username' => $username,
               'Password' => $password,
               'Signature' => $signature );

$Credentials = new stdClass();
$Credentials->Credentials = new SoapVar( $cred, SOAP_ENC_OBJECT, 'Credentials' );

$headers = new SoapVar( $Credentials,
                        SOAP_ENC_OBJECT,
                        'CustomSecurityHeaderType',
                        'urn:ebay:apis:eBLBaseComponents' );

$client->__setSoapHeaders( new SoapHeader( 'urn:ebay:api:PayPalAPI',
                                           'RequesterCredentials',
                                           $headers ));

$args = array( 'Version' => '71.0',
               'ReturnAllCurrencies' => '1' );

$GetBalanceRequest = new stdClass();
$GetBalanceRequest->GetBalanceRequest = new SoapVar( $args,
                                                     SOAP_ENC_OBJECT,
                                                     'GetBalanceRequestType',
                                                     'urn:ebay:api:PayPalAPI' );

$params = new SoapVar( $GetBalanceRequest, SOAP_ENC_OBJECT, 'GetBalanceRequest' );

$result = $client->GetBalance( $params );

echo 'Balance is: ', $result->Balance->_, $result->Balance->currencyID;

This produces the following XML request document, which, at the time of writing, was being successfully accepted and processed by PayPal:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
 xmlns:ns1="urn:ebay:apis:eBLBaseComponents" xmlns:ns2="urn:ebay:api:PayPalAPI"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <SOAP-ENV:Header>
  <ns2:RequesterCredentials>
   <ns1:Credentials xsi:type="Credentials">
    <Username>***</Username>
    <Password>***</Password>
    <Signature>***</Signature>
   </ns1:Credentials>
  </ns2:RequesterCredentials>
 </SOAP-ENV:Header>
 <SOAP-ENV:Body>
  <ns2:GetBalanceReq xsi:type="GetBalanceRequest">
   <GetBalanceRequest xsi:type="ns2:GetBalanceRequestType">
    <ns1:Version>71.0</ns1:Version>
    <ns2:ReturnAllCurrencies>1</ns2:ReturnAllCurrencies>
   </GetBalanceRequest>
  </ns2:GetBalanceReq>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

In response to some of the other comments on this page:

  • I’m fairly certain the OP has read the API doc, because that’s where the example XML came from that he is trying to reproduce using PHP SOAP library.
  • The PayPal PHP API has some shortcomings, the biggest one being that it fails to work with E_STRICT warnings turned on. It also requires PEAR, so if you are not currently using PEAR in your project it means dragging in quite a lot of new code, which means more complexity and potentially more risk, in order to achieve what should be two or three fairly simple XML exchanges for a basic implementation.
  • The NVP API looks pretty good too, but I’m a glutten for punishment, so I chose the hard path.
Advertisements