class Pracownik { 
   public function __construct() { 
      $this->ja = $this; 
   } 
}
$Bartek = new Pracownik(); 
$Janek = clone $Bartek; 
print (int)($Bartek == $Janek) . "\n"; 
print (int)($Janek === $Janek) . "\n"; 
