What best practices should be followed when designing multi-page forms in PHP to ensure seamless data transfer and processing?

When designing multi-page forms in PHP, it is essential to ensure seamless data transfer and processing by using sessions to store form data between pages. This allows users to navigate back and forth through the form without losing any previously entered information. Additionally, validating form data on each page and displaying error messages for any incorrect inputs can help improve the user experience. 

<?php
session_start();

// Check if form data is submitted
if($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate and sanitize form data
    $name = htmlspecialchars($_POST['name']);
    $email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
    
    // Store form data in session
    $_SESSION['name'] = $name;
    $_SESSION['email'] = $email;
    
    // Redirect to the next page
    header("Location: page2.php");
    exit();
}
?>

Keywords

PHP multi-page forms data transfer processing design.

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