(PHP ActiveX) PayPal - Cancel Sent Invoice

Cancels a sent invoice, by ID, and, optionally, sends a notification about the cancellation to the payer, merchant, and Cc: emails.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonToken = new COM("Chilkat.JsonObject");
$jsonToken->LoadFile('qa_data/tokens/paypal.json');

// Build the Authorization request header field value.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbAuth = new COM("Chilkat.StringBuilder");
// token_type should be "Bearer"
$sbAuth->Append($jsonToken->stringOf('token_type'));
$sbAuth->Append(' ');
$sbAuth->Append($jsonToken->stringOf('access_token'));

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rest')
$rest = new COM("Chilkat.Rest");
$bAutoReconnect = 1;
$success = $rest->Connect('api.sandbox.paypal.com',443,1,$bAutoReconnect);
if ($success != 1) {
    print $rest->LastErrorText . "\n";
    exit;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Build the JSON request body containing the reminder information:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$json->EmitCompact = 0;
$json->UpdateString('subject','Past due');
$json->UpdateString('note','Canceling invoice');
$json->UpdateBool('send_to_merchant',1);
$json->UpdateBool('send_to_payer',1);
print $json->emit() . "\n";

// The JSON created by the above code:

// 	{ 
// 	  "subject": "Past due",
// 	  "note": "Canceling invoice",
// 	  "send_to_merchant": true,
// 	  "send_to_payer": true
// 	}

// Build a path using a previously-sent invoice ID.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbPath = new COM("Chilkat.StringBuilder");
$sbPath->Append('/v1/invoicing/invoices/invoice_id/cancel');
$numReplacements = $sbPath->Replace('invoice_id','INV2-XPWZ-NUTQ-LNWB-P8NC');

$json->EmitCompact = 1;
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbRequestBody = new COM("Chilkat.StringBuilder");
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbResponseBody = new COM("Chilkat.StringBuilder");

$rest->AddHeader('Content-Type','application/json');
$rest->AddHeader('Authorization',$sbAuth->getAsString());
$json->EmitSb($sbRequestBody);

$success = $rest->FullRequestSb('POST',$sbPath->getAsString(),$sbRequestBody,$sbResponseBody);
if ($success != 1) {
    print $rest->LastErrorText . "\n";
    exit;
}

print 'Response Status Code = ' . $rest->ResponseStatusCode . "\n";

// In our testing, we received a 204 response, which is a success HTTP response code, but 
// differs from the PayPal REST API reference documentation, which states that a 202 response
// is expected.  I suspect an error in the PayPal documentation, or in the PayPal responder.
// Check for either 202 or 204..
// Did we get a 202 accepted response?
if (($rest->ResponseStatusCode != 202) and ($rest->ResponseStatusCode != 204)) {
    print $sbResponseBody->getAsString() . "\n";
    print 'Failed.' . "\n";
    exit;
}

// The 202/204 response should be empty.  (Again, our experience differs from the online PayPal documentation..)
print 'Success.' . "\n";

?>