What are some potential security risks associated with multi-page form submissions in PHP and how can they be mitigated?

Potential security risks associated with multi-page form submissions in PHP include CSRF attacks, data tampering, and session hijacking. These risks can be mitigated by implementing measures such as using CSRF tokens, validating input data on each page, and storing sensitive data securely. 

// Validate CSRF token on each form submission
session_start();

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (!isset($_POST['csrf_token']) || $_POST['csrf_token'] !== $_SESSION['csrf_token']) {
        die('CSRF token validation failed');
    }

    // Process form data
}

// Generate and store CSRF token
$csrf_token = bin2hex(random_bytes(32));
$_SESSION['csrf_token'] = $csrf_token;

Keywords

SQL injection Cross-site scripting (XSS) CSRF protection form validation secure coding practices

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