How can the issue of values disappearing after form submission be addressed in PHP?

The issue of values disappearing after form submission in PHP can be addressed by using sessions to store the form data. By storing the form data in a session variable, the values can be retained even after the form is submitted. This ensures that the values are not lost during the submission process. 

<?php
session_start();

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $_SESSION['form_data'] = $_POST;
    header("Location: form_success.php");
    exit();
}

// Retrieve form data from session if it exists
if (isset($_SESSION['form_data'])) {
    $form_data = $_SESSION['form_data'];
    unset($_SESSION['form_data']); // Clear form data from session
} else {
    $form_data = array();
}
?>

Keywords

PHP form submission session variables cookies data persistence

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