// Retrieve user data by ID $user_id = 1; $user_data = getUserById($user_id); // Output user data echo "User ID: " . $user_data['id'] . "
"; echo "Username: " . $user_data['username'] . "
"; echo "Email: " . $user_data['email'] . "
";
// Update user data by ID $user_id = 2; $user_data = getUserById($user_id); // Modify user data $user_data['password'] = password_hash('new_password', PASSWORD_DEFAULT); // Update user in database updateUserById($user_id, $user_data);In this example, we retrieve user data for a user with an ID of 2. We then update their password using the password_hash function, and update the user in the database using another function called updateUserById. The getUserById function is commonly found in PHP web development frameworks such as Laravel, Symfony, or CodeIgniter. It is likely part of a larger package or library that provides various functions for handling user authentication and authorization.