What are best practices for passing data between multiple PHP pages in a form submission process?

When passing data between multiple PHP pages in a form submission process, it is best practice to use sessions or cookies to store and retrieve the data. This ensures that the data is maintained as the user navigates through different pages. Sessions are preferred for sensitive data as they are stored on the server-side, while cookies can be used for non-sensitive information. 

// Page 1: Form submission
session_start();
$_SESSION['data'] = $_POST['data'];
header('Location: page2.php');
exit;

// Page 2: Retrieve data
session_start();
$data = $_SESSION['data'];
echo $data;

Keywords

session variables POST method GET method form handling data validation

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