What are the differences between using GET and POST methods in form submissions, and how can developers ensure they are using the appropriate method in their PHP scripts?

When submitting a form, developers can use either the GET or POST method. GET sends form data in the URL, visible to users and limited in length, while POST sends data in the request body, keeping it hidden and allowing for larger amounts of data. To ensure the appropriate method is used in PHP scripts, developers should consider the sensitivity and size of the data being submitted.

<form method="post" action="process_form.php">
    <!-- form fields here -->
</form>