Retrieve local variables for method?

[dantleech]

Would it be reasonable to retrieve the local variables which are available in a reflection method?

e.g.

class Foobar
{
    public function barfoo(NumberOne $one, NumberTwo $two)
    {
         $numberThree = 3;
    }
}

$vars = $reflection->getMethod('barfoo')->getLocalVariables();

// [
//     'one' => Variable(type=NumberOne, declaredAt=2)
//     'two  => Variable(type=NumberTwo, declaredAt=2)
//     'numberThree' => Variable(type=int, declaredAt=4
// ];

[asgrim]

I love this idea! We can definitely consider this one :)

[Ocramius]

Oh hell yeah, this would be awesome!

Could detect things like:

• local variable definition
• accessed instance properties
• accessed static properties
• accessed globals (global keyword)
• accessed super-globals (unsure about this one - probably sufficient to do a diff between locally defined variables and accessed variables)

[dantleech]

My motivation here is writing an auto-complete engine, as such the main problem is inferring the types of the local variables - we would need to resolve types from ASSIGN nodes the best we can (e.g. gettype($bar = $boo->baz->bad()) == 'string').

The only technical problem, I think, is how we determine the types of class properties so that we can resolve the expression chain:

1. Use @var annotations to infer member property types.
2. Fallback to guessing from the $this assignations in the __construct.

accessed instance properties
accessed static properties
accessed globals (global keyword)
accessed super-globals (unsure about this one - probably sufficient to do a diff between locally defined variables and accessed variables)

Makes sense - I guess these could be collected in the same visitor/thing.