In what scenarios would using a hidden input field alongside a checkbox be a suitable solution for handling checkbox values in PHP forms?

When dealing with checkboxes in PHP forms, a common issue is that unchecked checkboxes do not send any value when the form is submitted. To ensure that the checkbox state is always sent, you can use a hidden input field alongside the checkbox. This hidden input field will have a default value (e.g., 0) and will be overridden by the checkbox value (e.g., 1) if the checkbox is checked.

<input type="hidden" name="checkbox_name" value="0">
<input type="checkbox" name="checkbox_name" value="1">