如何找到方法属性/属性的类类型？ [重复]

I need to see what class type is being expected (type-hinted) for a method property.

<?php

class Foo {}

class Bar {
    public function do(Foo $foo_instance) {}
}

$bar = new Bar();
$some_instance = new ??();
$bar->do($some_instance);

?>

I think this is something available in the Reflection API, but I have yet to find anything that spits out 'Foo' as my type-hint for Bar::do. Any ideas?

Context

I want to do something like:

<?php
...
if ( myMethodExpects($class, $method, 'Foo') ) {
    $some_instance = new Foo();
} elseif ( myMethodExpects($class, $method, 'Baz') {
    $some_instance = new Baz();
} elseif ( myMethodHasNoTypeHint($class, $method) ) {
    $some_instance = 'just a string';
}
...
?>

</div>

Okay, asked Google the right questions.

I was looking for ReflectionParameter::getClass. Used like so:

<?php

class Foo {
   public function do(Bar $bar, Baz $baz, $foo='') {}
}

$method = new ReflectionMethod('Foo', 'do');
$method_params = $method->getParameters();
foreach ( $method_params as $param ) {
    var_dump($param->getClass());
}

?>

/* RETURNS
-> object(ReflectionClass)[6]
  public 'name' => string 'Bar' (length=3)
-> object(ReflectionClass)[6]
  public 'name' => string 'Baz' (length=4)
-> null
*/

This can also be used on ReflectionFunction:

$function_params = (new ReflectionFunction('func_name')->getParameters();