What are the best practices for using the action attribute in HTML form tags to ensure proper data handling and submission in PHP?

When using the action attribute in HTML form tags to submit data to a PHP script, it is important to ensure that the form data is handled securely and correctly. To do this, you should make sure that the action attribute points to the correct PHP script that will process the form data. Additionally, you should sanitize and validate the form data in the PHP script to prevent any security vulnerabilities or data manipulation.

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Sanitize and validate form data
    $name = htmlspecialchars($_POST["name"]);
    $email = filter_var($_POST["email"], FILTER_VALIDATE_EMAIL);

    // Process form data
    // Add your code to handle the form data here

    // Redirect or display a success message
    header("Location: success.php");
    exit();
}
?>