Untitled

<?php

class Foo
{
  public function bar()
  {
    $baz = 1;
    $qrz = 2;

    $name_of_fnc = function($name_of_func) use($bar, $qrz) {
      $res = $baz + $qrz;

      if ($res > 10) return $res;

      $baz++;
      $qrz++;

      return $name_of_fnc();
    };

    return function() {
       $name_of_fnc($name_of_fnc);
    };
  }
}

$foo = new Foo;
print call_user_func($foo->bar()); // 11