Description:
------------
I am unable to store lambda-style function within object properties, like I am with normal variables.  The below code does not work, neither does calling $this->$method() or using call_user_func() with passing in array($this, $this->method) for the callback.

Reproduce code:
---------------
<?php

class foo {
    public $method;

    function __construct() {
        $this->method = create_function('$a, $b', 'print $a . "\n" . $b . "\n\n"; ');

        $this->method('a', 'b');
    }
}

$x = new foo();
$x->method('a', 'b');

?>

Expected result:
----------------
a
b

a
b


Actual result:
--------------
Fatal error: Call to undefined method foo::method