How can PHP sessions be managed to prevent form data from persisting after submission?

To prevent form data from persisting after submission, you can unset the session variables containing the form data once the form is submitted. This ensures that the data is no longer stored in the session and will not be displayed again when the page is refreshed. 

// Start the session
session_start();

// Check if the form has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process the form data
    
    // Unset session variables containing form data
    unset($_SESSION['form_data']);
}

// Store form data in session
$_SESSION['form_data'] = $_POST;

Keywords

PHP sessions form data persistence submission management

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