Using PayPal for Recurring Billing

 
 $minChargebackProbability = 90;
  
 $duplicateBehavior = 'Fail';
  
 // Call update to update or create the autobill on Vindicia servers
  
 $response = $autobill->update($duplicateBehavior,
       $validatePaymentMethod, $minChargebackProbability);
  
 if($response['returnCode'] == 200) {
    printLog "AutoBill created \n";
  
    $txnStatus = $response['data']->refundsauthStatus;
    $redirectUrl = $txnStatus->payPalStatus->redirectUrl
    print "Visit " . $redirectUrl . 
       " to complete payment at PayPal site"
 }

...
$soap_caller = new AutoBill();
  
 // obtain id of the PayPal validation transaction
 // from the redirect URL. It is the value associated with name
 // 'vindicia_vid'
  
 $payPalTxId = … ;
  
 // if calling from return URL which is reached when the PayPal
 // transaction is successfully authorized you should set the
 // success input parameter to true
  
 $success = true;
 $response = 
       $soap_caller->finalizePayPalAuth($payPalTxId, $success);
  
 if($response['data']->refunds['returnCode'] == 200) {
    printLog "PayPal validation transaction successful";
    printLog "- subscription started";
 }