Are there any best practices or design patterns that can improve the efficiency and security of a multi-page form in PHP?

When dealing with a multi-page form in PHP, it is important to consider both efficiency and security. One way to improve efficiency is by using sessions to store form data across multiple pages, reducing the need to constantly pass data between pages. To enhance security, input validation and sanitization should be applied to prevent malicious input and potential attacks. 

<?php
session_start();

// Check if form data is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate and sanitize input data
    $input_data = filter_input_array(INPUT_POST, [
        'field1' => FILTER_SANITIZE_STRING,
        'field2' => FILTER_SANITIZE_EMAIL,
        // Add more fields as needed
    ]);

    // Store validated data in session
    $_SESSION['form_data'] = $input_data;

    // Redirect to the next page
    header("Location: page2.php");
    exit;
}
?>

Keywords

PHP form handling security design patterns efficiency

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