获取时间范围的 闲的蛋疼的看看

public function Datetime($type){
        $datetime = array();
        if ($type == 'w'){
                    $week=date('w')==0?7:date('w');
            $datetime = array(
                mktime(0, 0 , 0,date("m"),date("d")-$week+1,date("Y")),
                mktime(23,59,59,date("m"),date("d")-$week+7,date("Y"))
            );
        }else if ($type == 'm'){
            $datetime = array(
                mktime(0, 0 , 0,date("m"),1,date("Y")), 
                mktime(23,59,59,date("m"),date("t"),date("Y"))
            );
        }else if($type == 'd'){
            $datetime = array(
                mktime(0, 0 , 0,date("m"),date("d"),date("Y")), 
                mktime(23,59,59,date("m"),date("d"),date("Y"))
            );
        }else if($type=='s'){
                    $season = ceil((date('n'))/3);
                    $datetime=array(
                        mktime(0, 0, 0,$season*3-3+1,1,date('Y')),
                        mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))
                    );
                }else if($type=='y'){
                    $datetime=array(
                        mktime(0,0,0,1,1,date('Y')),
                        mktime(23,59,59,12,date('t',mktime(0, 0 , 0,12,1,date("Y"))),date('Y'))
                    );
                }
        return $datetime;
    }

 这个函数超级实用