PHP后台获取每天新增用户

/**
*  报表页面
*   write by wanglas
*/
public function shouye(){
//统计会员总数
$name='user';
$user=M($name);
$num=$user->where(1)->count();
//计算会员增长数量
for ($i=1 ; $i < 100; $i++) {
$today=strtotime(date('Ymd'));
$now  = $today-86400*($i-1);
$time = $today-86400*$i;
$map['create_time']=array('between',array($time,$now));
$inc_num=$user->where($map)->count();
$arr_t[]=$now;
$arr_n[]=$inc_num;
}
//逆序输出数组
$arr_t=array_reverse($arr_t);  //时间
$arr_n=array_reverse($arr_n);  //数量
$this->assign('arr_t',$arr_t);
$this->assign('arr_n',$arr_n);

$this->assign('now',$now);
$this->assign('time',$time);
$this->assign('num_total',$num);  //会员总数
$this->display();
}