How can the PHP code be optimized to ensure that values are properly displayed and stored in SESSION variables upon form submission?

To optimize the PHP code for displaying and storing values in SESSION variables upon form submission, ensure that the form fields are properly sanitized and validated before storing them in SESSION variables. Additionally, use isset() function to check if the form has been submitted before processing the data. 

<?php
session_start();

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Sanitize and validate form data
    $username = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
    $email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

    // Store validated data in SESSION variables
    $_SESSION['username'] = $username;
    $_SESSION['email'] = $email;
}
?>

Keywords

PHP optimization SESSION variables form submission data storage

Related Questions