Test if string could be boolean PHP

Question

I\'m getting a string from a $_GET and I want to test if it could be a boolean, before I use it for a part of a mysql query. Is there a better way of doing it than:

Answer 1

If you use the flag FILTER_NULL_ON_FAILURE, filter_var() will work nicely:

function CheckBool($Value) {
  return null !== filter_var($Value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
}