WP_Session_Tokens::create() WordPress Method

	final public function create( $expiration ) {
		/**
		 * Filters the information attached to the newly created session.
		 *
		 * Can be used to attach further information to a session.
		 *
		 * @since 4.0.0
		 *
		 * @param array $session Array of extra data.
		 * @param int   $user_id User ID.
		 */
		$session               = apply_filters( 'attach_session_information', array(), $this->user_id );
		$session['expiration'] = $expiration;

		// IP address.
		if ( ! empty( $_SERVER['REMOTE_ADDR'] ) ) {
			$session['ip'] = $_SERVER['REMOTE_ADDR'];
		}

		// User-agent.
		if ( ! empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
			$session['ua'] = wp_unslash( $_SERVER['HTTP_USER_AGENT'] );
		}

		// Timestamp.
		$session['login'] = time();

		$token = wp_generate_password( 43, false, false );

		$this->update( $token, $session );

		return $token;
	}