PHP - self, static or $this in callback function

Question

Is it possible to access classes/objects reffered as self , static and $this in anonymous callbacks in PHP? Just like this:

class Foo {
    const BAZ = 5;
    public static function bar() {
         echo self::BAZ; // it works OK
         array_filter(array(1,3,5), function($number) /* use(self) */ {
             return $number !== self::BAZ; // I cannot access self from here
         });
    }
}

Is there any way to make it behave as with usual variables, using use(self) clause?

Answer 1

With PHP5.4 it will be. For now it's not possible. However, if you only need access to public properties, method

$that = $this;
function () use ($that) { echo $that->doSomething(); }

For constants there is no reason to not use the qualified name

function () { echo Classname::FOO; }

Answer 2

Just use the standard way:

Foo::BAZ;

or

$baz = self::BAZ;
... function($number) use($baz) {
   $baz;
}

Answer 3

What about this:

class Foo {
    const BAZ = 5;
    $self = __class__;
    public static function bar() {
         echo self::BAZ; // it works OK
         array_filter(array(1,3,5), function($number) use($self) {
             return $number !== $self::BAZ; // access to self, just your const must be public
         });
    }
}