(PHP Extension) citi Developer OAuth2 Client Credentials Grant

Get access token for your application credentials. You can use this for citi APIs which do not require customer credential verification and consent (e.g. Onboarding).

For more information, see https://sandbox.developerhub.citi.com/api/united-states/retail-bank/identity-security/authorize/documentation

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$http = new CkHttp();

// Implements the following CURL command:

// curl --request POST \
//   --url https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb \
//   --header 'accept: application/json' \
//   --user client-id:client-secret \
//   --header 'content-type: application/x-www-form-urlencoded' \
//   --data 'grant_type=client_credentials&scope=%2Fapi'

$http->put_Login('client-id');
$http->put_Password('client-secret');

$req = new CkHttpRequest();
$req->put_HttpVerb('POST');
$req->put_Path('/gcb/api/clientCredentials/oauth2/token/us/gcb');
$req->put_ContentType('application/x-www-form-urlencoded');
$req->AddParam('grant_type','client_credentials');
$req->AddParam('scope','/api');
$req->AddHeader('accept','application/json');

// resp is a CkHttpResponse
$resp = $http->PostUrlEncoded('https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb',$req);
if ($http->get_LastMethodSuccess() == false) {
    print $http->lastErrorText() . "\n";
    exit;
}

$sbResponseBody = new CkStringBuilder();
$resp->GetBodySb($sbResponseBody);
$jResp = new CkJsonObject();
$jResp->LoadSb($sbResponseBody);
$jResp->put_EmitCompact(false);

print 'Response Body:' . "\n";
print $jResp->emit() . "\n";

$respStatusCode = $resp->get_StatusCode();
print 'Response Status Code = ' . $respStatusCode . "\n";
if ($respStatusCode >= 400) {
    print 'Response Header:' . "\n";
    print $resp->header() . "\n";
    print 'Failed.' . "\n";

    exit;
}

$success = $jResp->WriteFile('qa_data/tokens/citi_client_credentials.json');
if ($success == false) {
    print 'Failed to save JSON access token file.' . "\n";
    exit;
}

//  Sample JSON response:
//  (Sample code for parsing the JSON response is shown below)

//  {
//    "token_type": "bearer",
//    "access_token": "AAIkMjdh ... 3fsWb7zJ0s",
//    "expires_in": 1800,
//    "consented_on": 1584817860,
//    "scope": "/api"
//  }

//  Sample code for parsing the JSON response...
//  Use the following online tool to generate parsing code from sample JSON:
//  Generate Parsing Code from JSON

$token_type = $jResp->stringOf('token_type');
$access_token = $jResp->stringOf('access_token');
$expires_in = $jResp->IntOf('expires_in');
$consented_on = $jResp->IntOf('consented_on');
$scope = $jResp->stringOf('scope');

?>