// Start the session session_start(); // Set a session variable $_SESSION['name'] = 'John'; // Set another session variable $_SESSION['age'] = 29;In this example, we start a session using the `session_start()` function and then set two session variables using the `setSession` function. One session variable is called `name` and its value is `John`. The other session variable is called `age` and its value is `29`. This function is typically found in the PHP `session` package library. The package provides a convenient way to store session data so that it can be shared across different pages of a website or web application.