How can you ensure that a variable from a form remains true instead of false in PHP?

To ensure that a variable from a form remains true instead of false in PHP, you can explicitly check if the form input is set and has a truthy value before assigning it to the variable. This way, you can avoid unintentionally setting the variable to false if the form input is not provided or is empty.

// Check if the form input is set and has a truthy value before assigning it to the variable
$variable = isset($_POST['form_input']) && $_POST['form_input'] ? true : false;