In what situations should session variables be passed as parameters to PHP functions for better code structure?

When passing session variables as parameters to PHP functions, it can improve code structure by making the function more reusable and reducing its dependencies on global variables. This can also make the function easier to test and maintain, as it becomes more self-contained and less reliant on external state. 

// Passing session variables as parameters to a PHP function for better code structure

// Function that uses session variables as parameters
function processUserData($username, $email) {
    // Process user data here
}

// Get session variables
session_start();
$username = $_SESSION['username'];
$email = $_SESSION['email'];

// Call the function with session variables as parameters
processUserData($username, $email);

Keywords

session variables PHP functions code structure parameter passing error types

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