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<?php
/**
 * @author Mubashir Ali (Lahore, Pakistan)
 * [email protected]
 * @category Paypal Invoice API
 * @@abstract This performs the UpdateInvoice API Operation
 * @since 03-01-2011
 * @version 2.0
 */
 
 $API_Username = "xxxxxxxxxxxxxxxxx.xxx.xxx";
 $API_Password = "xxxxxxxxxx";
 $Signature    = "xxxxxxxxxxxxxxxxx.xxxxxxxxxxxxx-xxxxxxxxxxxxx-xxxxxxxxxx";
 $business = "[email protected]";
 
 require_once('class.invoice.php');
 
 $ppInv = new PaypalInvoiceAPI("sandbox");
 
 /**
 * Populate Data
 */
 $aryData['language'] = "en_US";
 $aryData['merchantEmail'] = $business;
 
 $aryData['payerEmail'] = "[email protected]";
 $aryData['currencyCode'] = "USD";
 
 $aryData['orderId'] = strtotime('now');
 $aryData['paymentTerms'] = "Net10";   //[DueOnReceipt, DueOnDateSpecified, Net10, Net15, Net30, Net45]
 $aryData['logoURL'] = "Company Logo URL";
 $aryData['invoiceID'] = "xxxx-xxxx-xxxx-xxxx-xxxx";
 
 $aryItems[0]['name'] = "Item 1";
 $aryItems[0]['description'] = "Item 1 Description";
 $aryItems[0]['date'] = "2011-12-31T05:38:48Z";
 $aryItems[0]['quantity'] = "2";
 $aryItems[0]['unitprice'] = "10.00";
 $aryItems[0]['taxName'] = "I Tax Name";
 $aryItems[0]['taxRate'] = "5.00";
 
 $res = $ppInv->doUpdateInvoice($aryData, $aryItems);
 if($res['responseEnvelope.ack']== "Success")
 {
 echo "<pre>";
 print_r($res);
 echo "</pre>";
 }
 else
 {
 echo $ppInv->formatErrorMessages($res);
 }
 
 ?>
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