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

You can either use is_bool() or as suggested on php.net:

http://php.net/manual/en/function.is-bool.php

The latter one will accept strings like "on" and "yes" as true as well.