PHP Zend Framework

<?php

$this->_config = array(
    'authorize_endpoint'=> 'https://api.actionstep.com/api/oauth/authorize',
    'token_endpoint'    => 'https://api.actionstep.com/api/oauth/token',
    'client_id'         => {YOUR CLIENT_ID},
    'client_secret'     => {YOUR CLIENT_SECRET},
    'redirect_uri'      => {URI YOU WANT ACTIONSTEP TO REDIRECT THE USER TO ONCE AUTHORIZED},
    'scope'            	=> {THE SCOPE YOU ARE REQUESTING ACCESS TO (COMMA SEPARATED LIST OF RESOURCES - i.e. Actions,Participants,Timerecords)},
    'cookies'   		=> array()
);
 
ApiClient::authorize($this->_config);

<?php
 
// Convert to Access Token
$response = ApiClient::tokenAuthorizationCode($this->_config, $_GET['code']);
 
// Store the Access Token
$_SESSION['oauth2_tokendata'] = $response;
 
// Redirect to application to execute API requests
$this->redirect({URI TO YOUR APPLICATION});