class Hoge {
  var $a;
  var $b;
  function Hoge($a, $b) {
    $this->a = $a;
    $this->b = $b;
  }
}

class Hoge {
  private $a;
  private $b;
  public function __construct($a, $b) {
    $this->a = $a;
    $this->b = $b;
  }
}