类写的select多选

没技术含量。。 

<?
class dd{
    var $qq;
   function show_qq(){
     $arr=array("山东","德州","北京","厦门","上海");
  echo "<select>";
  foreach($arr as $dd=>$qq){
  echo "<option name='$qq'>$qq</option>";
  }
  echo "</select>";
     echo  $arr.$this->qq;
  
     }
  }
  $dd= new dd;
  $dd->show_qq();
?>