add idempotency key options in disbursement

README.md

@@ -25,6 +25,12 @@ cd src/
 php examples/create_disbursement_example.php "CUSTOM_ID_1"  30000 "BCA" "Rizky" "1234567890"
 ```
 
+# Create Disbursement With Idempotency Key Example : #
+```
+cd src/
+php examples/create_disbursement_with_idempotency_key_example.php "CUSTOM_ID_1"  30000 "BCA" "Rizky" "1234567890" "idempotencykeytest123"
+```
+
 # GET Disbursement Example : #
 ```
 cd src/

src/XenditPHPClient.php

@@ -37,12 +37,16 @@ function createInvoice ($external_id, $amount, $payer_email, $description) {
             return $responseObject;
         }
 
-        function createDisbursement ($external_id, $amount, $bank_code, $account_holder_name, $account_number) {
+        function createDisbursement ($external_id, $amount, $bank_code, $account_holder_name, $account_number, $disbursement_options = null) {
             $curl = curl_init();
 
             $headers = array();
             $headers[] = 'Content-Type: application/json';
 
+            if (!empty($disbursement_options['X-IDEMPOTENCY-KEY'])) {
+                array_push($headers, 'X-IDEMPOTENCY-KEY: '.$disbursement_options['X-IDEMPOTENCY-KEY']);
+            }
+
             $end_point = $this->server_domain.'/disbursements';
 
             $data['external_id'] = $external_id;

src/examples/create_disbursement_with_idempotency_key_example.php

@@ -0,0 +1,18 @@
+<?php
+    require('config/xendit_php_client_config.php');
+    require('XenditPHPClient.php');
+
+    $options['secret_api_key'] = constant('SECRET_API_KEY');
+
+    $xenditPHPClient = new XenditClient\XenditPHPClient($options);
+
+    $external_id = $argv[1];
+    $amount = $argv[2];
+    $bank_code = $argv[3];
+    $account_holder_name = $argv[4];
+    $account_number = $argv[5];
+    $disbursement_options['X-IDEMPOTENCY-KEY'] = $argv[6];
+
+    $response = $xenditPHPClient->createDisbursement($external_id, $amount, $bank_code, $account_holder_name, $account_number, $disbursement_options);
+    print_r($response);
+?>