php 获取今天即未来一周的时间段

 //前端调用7天的日期和时间
    public function getf7()
    {
        $data = [];
        $format = 'm-d';
        for ($i = 0; $i < 7; $i++) {

            $strtotime = strtotime('+' . ($i) . ' days');

            $data[$i]['date'] = date($format, $strtotime);

            $data[$i]['week'] = "周" . mb_substr("日一二三四五六", date("w", $strtotime), 1, "utf-8");
        }
        return $this->json_data(array('data' => $data, 'st' => 1));
    }