Question

当我运行此代码时：

    $yearRes=DB::table('order')
            ->select(DB::raw("year(created_at) as y"))
            ->orderBy("created_at")
            ->groupBy(DB::raw("year(created_at)"))->get();
    foreach ($yearRes as $key => $value) {
        $totalOrder[]=DB::table('order')->select(DB::raw("year(created_at) as y,sum(item_price) as p,count(id) as i"))->whereYear('created_at', '=', $value->y)->get();
    }

它告诉我这个：

[[{"y":2016,"p":15050,"i":11}],[{"y":2017,"p":8440,"i":3}]]

当我运行此代码时

 $abc=json_encode($totalOrder);
  $a=rtrim($abc);
  $title=explode('[', $a);
  $c=implode('', $title);
  $ac=rtrim($c,']');

......结果如下：

{"y":2016,"p":15050,"i":11}],{"y":2017,"p":8440,"i":3}

但我希望输出看起来像这样：

{"y":2016,"p":15050,"i":11},{"y":2017,"p":8440,"i":3}

我的代码出了什么问题？

Answer 1

这将对您有所帮助：

echo trim(json_encode(array_column($totalOrder, 0)), '[]');

Answer 2

最重要的是您想要对输出做什么和/或希望访问输出的位置和方式;看起来不那么无关紧要

Answer 3

你不需要所有rtrim。你正在做的是一个黑客，而不是一个真正的解决方案。

您需要做的是在foreach中的代码上附加->first()，例如：

$yearRes=DB::table('order')
            ->select(DB::raw("year(created_at) as y"))
            ->orderBy("created_at")
            ->groupBy(DB::raw("year(created_at)"))->get();
    foreach ($yearRes as $key => $value) {
        $totalOrder[]=DB::table('order')->select(DB::raw("year(created_at) as y,sum(item_price) as p,count(id) as i"))->whereYear('created_at', '=', $value->y)->get()->first();
    }

然后您可以删除rtrims和其他不必要的行。只需保留第一行

$abc=json_encode($totalOrder);

删除php中不需要的数组

3 个答案: