Description:
------------
I'd like to make a helper library that can use call_user_func outside of the 
object context, but still use private methods (obviously only when called from 
inside the object).

Example attached:

Test script:
---------------
<?php

class A { 
  private function test1() {
    print 'side effect 1';
    return false;
  }
  private function test2() {
    print 'side effect 2';
    return 'yay';
  }
  private function test3() {
    print 'side effect 3';
    return 'nope';
  }
  public function first() {
    return nonempty_lazy(
      array(array($this, 'test1')),
      array(array($this, 'test2')),
      array(array($this, 'test3')));
  }
}

function nonempty_lazy() {
  $args = func_get_args();
  foreach ($args as $arg) {
    $cb = array_shift($arg);
    $val = call_user_func_array($cb, $arg);
    if (!empty($val))
      return $val;
  }
}

$a = new A;
print $a->first();


Expected result:
----------------
side effect 1side effect 2yay

Actual result:
--------------
Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot 
access private method A::test1() in /Users/ptarjan/tmp/cufa.php on line 28

Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot 
access private method A::test2() in /Users/ptarjan/tmp/cufa.php on line 28

Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot 
access private method A::test3() in /Users/ptarjan/tmp/cufa.php on line 28