Infusionsoft_App::__construct PHP Method

    public function __construct($hostname = '', $apiKeyOrStorageProvider = null, $port = 443)
    {
        if (strpos($hostname, ".") === false) {
            $hostname = $hostname . '.infusionsoft.com';
        }
        $this->hostname = $hostname;
        if (is_a($apiKeyOrStorageProvider, 'Infusionsoft_TokenStorageProvider')) {
            /** @var Infusionsoft_TokenStorageProvider $storageProvider */
            $this->tokenStorageProvider = $apiKeyOrStorageProvider;
        } elseif ($apiKeyOrStorageProvider == null) {
            $this->tokenStorageProvider = Infusionsoft_AppPool::getDefaultStorageProvider();
        } else {
            $this->apiKey = $apiKeyOrStorageProvider;
        }
        if ($this->tokenStorageProvider != null) {
            $this->usingOAuth = true;
            $tokens = $this->tokenStorageProvider->getTokens($this->hostname);
            $this->accessToken = $tokens['accessToken'];
            $this->refreshToken = $tokens['refreshToken'];
            $this->tokenExpiresAt = $tokens['expiresAt'];
        }
        $this->port = $port;
        if ($this->usingOAuth) {
            $this->client = new xmlrpc_client('/crm/xmlrpc/v1', 'api.infusionsoft.com', 443);
        } else {
            $this->client = new xmlrpc_client('/api/xmlrpc', $this->getHostname(), $this->port);
        }
        $this->client->setSSLVerifyPeer(true);
        $this->client->setCaCertificate(dirname(__FILE__) . '/infusionsoft.pem');
        $this->client->request_charset_encoding = "UTF-8";
        if ($this->usingOAuth == true) {
            $this->client->extraUrlParams = array('access_token' => $this->accessToken);
        }
    }