* Thus wrote Gerard Samuel:
> Im unable to find documentation on this.
> Does one exist?  If so can you point me to it.

I dont think anything officially exist in the manual, yet. The type
hint can only be an Object, and will cause a fatal error if not the
paticular object isn't passed.

class Foo { };

function bar(Foo $foo) { }
  

$a = new Foo();
foo($a); 


foo('a string'); // Fatal Error


The most useful use with type hinting can/is used is with
exceptions. The catch() requires a type hint of what class of
exception to catch:

try {
  some_code();
}
catch (CustomException $e) {
}
catch (Exception $e) { // if CustomException isn't thrown
}

Curt
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