SimpleSAML_Configuration::init PHP Method

    public static function init($path, $instancename = 'simplesaml', $configfilename = 'config.php')
    {
        assert('is_string($path)');
        assert('is_string($instancename)');
        assert('is_string($configfilename)');
        if ($instancename === 'simplesaml') {
            // for backwards compatibility
            self::setConfigDir($path, 'simplesaml');
        }
        // check if we already have loaded the given config - return the existing instance if we have
        if (array_key_exists($instancename, self::$instance)) {
            return self::$instance[$instancename];
        }
        self::$instance[$instancename] = self::loadFromFile($path . '/' . $configfilename, true);
        return self::$instance[$instancename];
    }

 /**
  * Default Constructor
  *
  * Instantiate an instance of the SimpleSAML_Auth_Simple class
  * and call requireAuth() to validate a user
  *
  * @param array $options Array of options to pass to the constructor
  *
  */
 function __construct($options = array())
 {
     // Auto load  libraries and
     // obtain simple SAML SP configuration data
     $this->samlLib = $options["ssphp_lib"];
     $this->samlConfig = $options["ssphp_config"];
     require_once $this->samlLib . '/lib/_autoload.php';
     SimpleSAML_Configuration::init($this->samlConfig);
     // You can specifically overide any of the default configuration options setup above
     if (count($options) > 0) {
         if (array_key_exists("ssphp_sp", $options)) {
             $this->ssphpSP = $options["ssphp_sp"];
         } else {
             Log::Error("Could not connect to SAML service provider." . "  Please check your SAML configuration settings");
         }
     }
     $this->authSimple = new SimpleSAML_Auth_Simple($this->ssphpSP);
     // requireAuth() redirects user to SSO login page
     // where user needs to enter SSO username and password.
     // If user is not validated, then this function does not return
     $this->authSimple->requireAuth();
 }