What are some common pitfalls when passing form data from one PHP file to another, as seen in the provided code snippet?

One common pitfall when passing form data from one PHP file to another is not properly sanitizing and validating the input data. This can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To solve this issue, always sanitize and validate user input before using it in your code.

// Original code snippet with common pitfalls
$name = $_POST['name'];
$email = $_POST['email'];

// Fix: Sanitize and validate input data
$name = filter_var($_POST['name'], FILTER_SANITIZE_STRING);
$email = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);