Description:
------------
When a class does not have member variables, creating a static instance of the class becomes impossible. See the code below. If the member variable is declared, one onstance is created, and each next call to getInstance will return the existing instance.Without the member var, new instances are created every time.

Reproduce code:
---------------
class mySingleton
{
  // var $m_dummy = ""; // uncommenting this line is a 
                        // workaround

  function &getInstance()
  {
    static $s_instance = NULL;
    if ($s_instance == NULL)
    {
      echo "Creating a new instance<br>";
      $s_instance = new mySingleton();
    }
    else
    {
      echo "Using existing instance<br>";
    }
    return $s_instance;
  }
}

$tmp = &mySingleton::getIntance();
$tmp2 = &mySingleton::getIntance();



Expected result:
----------------
Creating a new instance
Using existing instance

Actual result:
--------------
Creating a new instance
Creating a new instance