PayPal\Common\PPApiContext::get PHP Method

    public function get($searchKey)
    {
        if (!isset($this->config)) {
            return PPConfigManager::getInstance()->get($searchKey);
        } else {
            if (array_key_exists($searchKey, $this->getConfig())) {
                return $this->config[$searchKey];
            }
        }
        return false;
    }

 /**
  * Returns the PayPal URL to which the user must be redirected to
  * start the authentication / authorization process.
  *
  * @param string $redirectUri Uri on merchant website to where
  * 				the user must be redirected to post paypal login
  * @param array $scope The access privilges that you are requesting for
  * 				from the user. Pass empty array for all scopes.
  * @param string $clientId client id from developer portal
  * 				See https://developer.paypal.com/webapps/developer/docs/integration/direct/log-in-with-paypal/detailed/#attributes for more
  * @param PPApiContext $apiContext Optional API Context
  */
 public static function getAuthorizationUrl($redirectUri, $scope, $clientId, $nonce = null, $state = null, $apiContext = null)
 {
     if (is_null($apiContext)) {
         $apiContext = new PPApiContext();
     }
     $config = $apiContext->getConfig();
     if ($apiContext->get($clientId) !== false) {
         $clientId = $apiContext->get($clientId);
     }
     $scope = count($scope) != 0 ? $scope : array('openid', 'profile', 'address', 'email', 'phone', 'https://uri.paypal.com/services/paypalattributes', 'https://uri.paypal.com/services/expresscheckout');
     if (!in_array('openid', $scope)) {
         $scope[] = 'openid';
     }
     $params = array('client_id' => $clientId, 'response_type' => 'code', 'scope' => implode(" ", $scope), 'redirect_uri' => $redirectUri);
     if ($nonce) {
         $params['nonce'] = $nonce;
     }
     if ($state) {
         $params['state'] = $state;
     }
     return sprintf("%s/v1/authorize?%s", self::getBaseUrl($config), http_build_query($params));
 }