function __construct($username, $password, $env, $campaignid) { if (!in_array($env, array('test', 'production'))) { $this->error('Environment "' . htmlentities($env) . '" is not valid. Only "production" and "test" are supported.'); } self::$username = $username; self::$password = $password; self::$env = $env; self::$campaignid = $campaignid; }