PHP ActiveX

Okta Client Credentials FLow

See more Okta OAuth/OIDC Examples

The Client Credentials flow is recommended for use in machine-to-machine authentication. Your application will need to securely store its Client ID and Secret and pass those to Okta in exchange for an access token. At a high-level, the flow only has two steps:

• Your application passes its client credentials to your Okta authorization server.
• If the credentials are accurate, Okta responds with an access token.

Note: This example uses "customScope". You'll replace it with whatever scope(s) you've defined for your app. Scopes are defined in your Authorization Server. See Okta Authorization Server / Scopes

PHP ActiveX

<?php

$success = 0;

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

$http = new COM("Chilkat.Http");

// Implements the following CURL command:

// curl --request POST \
//   --url https://{yourOktaDomain}/oauth2/default/v1/token \
//   --header 'accept: application/json' \
//   --user "client_id:client_secret" \
//   --header 'cache-control: no-cache' \
//   --header 'content-type: application/x-www-form-urlencoded' \
//   --data 'grant_type=client_credentials&scope=customScope'

$http->Login = 'client_id';
$http->Password = 'client_secret';

$req = new COM("Chilkat.HttpRequest");
$req->HttpVerb = 'POST';
$req->Path = '/oauth2/default/v1/token';
$req->ContentType = 'application/x-www-form-urlencoded';
$req->AddParam('grant_type','client_credentials');
$req->AddParam('scope','customScope');

$req->AddHeader('accept','application/json');

$resp = new COM("Chilkat.HttpResponse");
$success = $http->HttpReq('https://{yourOktaDomain}/oauth2/default/v1/token',$req,$resp);
if ($success == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

$sbResponseBody = new COM("Chilkat.StringBuilder");
$resp->GetBodySb($sbResponseBody);
$jResp = new COM("Chilkat.JsonObject");
$jResp->LoadSb($sbResponseBody);
$jResp->EmitCompact = 0;

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

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

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

// {
//   "access_token": "eyJraWQiO ... B2CnCLj7GRUW3mQ",
//   "token_type": "Bearer",
//   "expires_in": 3600,
//   "scope": "customScope"
// }

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

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

?>