How can PHP be used to prevent a page from reloading entirely when refreshed?

When a page is refreshed, the entire page reloads, causing any user input or form data to be lost. To prevent this, we can use PHP to store the form data in session variables and then repopulate the form fields with this data when the page is reloaded. 

<?php
session_start();

// Check if form data has been submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Store form data in session variables
    $_SESSION['name'] = $_POST['name'];
    $_SESSION['email'] = $_POST['email'];
    // Add more form fields as needed
}

// Repopulate form fields with session data
$name = isset($_SESSION['name']) ? $_SESSION['name'] : '';
$email = isset($_SESSION['email']) ? $_SESSION['email'] : '';
// Add more form fields as needed
?>

<form method="post" action="">
    <input type="text" name="name" value="<?php echo $name; ?>" placeholder="Name">
    <input type="email" name="email" value="<?php echo $email; ?>" placeholder="Email">
    <!-- Add more form fields as needed -->
    <button type="submit">Submit</button>
</form>

Keywords

PHP AJAX XMLHttpRequest prevent page reload asynchronous requests

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