thinkphp3.2 判断星期几

$w=date('w');        $week=array(            "0"=>"星期日",            "1"=>"星期一",            "2"=>"星期二",            "3"=>"星期三",            "4"=>"星期四",            "5"=>"星期五",            "6"=>"星期六"        );        $zhou =$week[$w];        $this->assign('zhou',$zhou);

<time>{$zhou}</time>