What are the best practices for handling sensitive or large data in PHP when passing information via links?

When passing sensitive or large data via links in PHP, it is best practice to avoid using GET parameters as they can be easily exposed in the URL. Instead, you should use POST requests to securely transmit the data. You can achieve this by submitting a form with hidden input fields containing the sensitive data. This way, the data is not visible in the URL and is transmitted securely.

<form method="post" action="process_data.php">
    <input type="hidden" name="sensitive_data" value="your_sensitive_data_here">
    <input type="submit" value="Submit">
</form>