How can PHP developers provide users with a confirmation message after submitting a form?

After a user submits a form, PHP developers can provide a confirmation message by redirecting the user to a new page that displays the message. This can be achieved by setting a session variable before the redirect and then checking for this variable on the new page to display the confirmation message. 

// On the form submission page
session_start();
$_SESSION['confirmation_message'] = "Form submitted successfully.";
header("Location: confirmation_page.php");
exit();

// On the confirmation_page.php
session_start();
if(isset($_SESSION['confirmation_message'])) {
    echo $_SESSION['confirmation_message'];
    unset($_SESSION['confirmation_message']);
}

Keywords

PHP form submission confirmation message JavaScript AJAX

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