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

There's, by the way, a cleaner way of writing it:

function checkBool($string){
    $string = strtolower($string);
    return (in_array($string, array("true", "false", "1", "0", "yes", "no"), true));
}

But yes. The one you wrote down is the only way.