What are the benefits and drawbacks of using scripts to handle redirects after form submissions in PHP?

Using scripts to handle redirects after form submissions in PHP can help improve user experience by redirecting users to a different page after they submit a form. This can be useful for displaying a success message or redirecting users to a different page based on their input. However, relying solely on client-side redirects can pose security risks, such as open redirect vulnerabilities. It's important to validate user input and sanitize data to prevent potential security threats.

// Process form submission
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate and sanitize form data
    // Perform necessary actions (e.g. save data to database)

    // Redirect to a different page after form submission
    header("Location: success.php");
    exit;
}