public function __construct() {

    $this->use_php_sessions = $this->use_php_sessions();

    if( $this->use_php_sessions ) {

      if( is_multisite() ) {

        $this->prefix = '_' . get_current_blog_id();

      }

      // Use PHP SESSION (must be enabled via the EDD_USE_PHP_SESSIONS constant)
      add_action( 'init', array( $this, 'maybe_start_session' ), -2 );

    } else {

      if( ! $this->should_start_session() ) {
        return;
      }

      // Use WP_Session (default)

      if ( ! defined( 'WP_SESSION_COOKIE' ) ) {
        define( 'WP_SESSION_COOKIE', 'edd_wp_session' );
      }

      if ( ! class_exists( 'Recursive_ArrayAccess' ) ) {
        require_once EDD_PLUGIN_DIR . 'includes/libraries/class-recursive-arrayaccess.php';
      }

      if ( ! class_exists( 'WP_Session' ) ) {
        require_once EDD_PLUGIN_DIR . 'includes/libraries/class-wp-session.php';
        require_once EDD_PLUGIN_DIR . 'includes/libraries/wp-session.php';
      }

      add_filter( 'wp_session_expiration_variant', array( $this, 'set_expiration_variant_time' ), 99999 );
      add_filter( 'wp_session_expiration', array( $this, 'set_expiration_time' ), 99999 );

    }

    if ( empty( $this->session ) && ! $this->use_php_sessions ) {
      add_action( 'plugins_loaded', array( $this, 'init' ), -1 );
    } else {
      add_action( 'init', array( $this, 'init' ), -1 );
    }

  }