Are there specific PHP functions or techniques that can help improve the user experience when navigating back and forth between pages with form data?

When navigating back and forth between pages with form data, it is important to maintain the user input to provide a seamless experience. One way to achieve this is by using sessions to store the form data and repopulate the fields when the user returns to the page. 

// Start or resume a session
session_start();

// Check if form data has been submitted
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    // Store form data in session variables
    $_SESSION['form_data'] = $_POST;
} else {
    // Check if there is stored form data in session
    if (isset($_SESSION['form_data'])) {
        // Repopulate form fields with stored data
        $form_data = $_SESSION['form_data'];
    }
}

Keywords

session management form data persistence cookies server-side validation redirecting pages

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