Question

我想从数组中删除数组，但数组在$variable中。我没有找到任何在$variable数组中包含数组的示例。

功能：

     public function firstHourTrades()
{

    $user_id = Auth::user()->id;
    $first_hour = DB::table('finaltrade')
        ->select(DB::raw('count(*) as first'))
        ->join('exchanges', 'finaltrade.exchange_id', '=', 'exchanges.id')
        ->where('finaltrade.user_id', $user_id)
        ->whereTime(DB::raw('IF(finaltrade.buy_datetime<finaltrade.sell_datetime, finaltrade.buy_datetime, finaltrade.sell_datetime) '), '>=', DB::raw('exchanges.start_time'))
        ->whereTime(DB::raw('IF(finaltrade.buy_datetime<finaltrade.sell_datetime, finaltrade.buy_datetime, finaltrade.sell_datetime) '), '<=', DB::raw("ADDTIME(exchanges.start_time, '01:00:00')"))
        ->get();


    $last_hour = DB::table('finaltrade')
        ->select(DB::raw('count(*) as last'))
        ->join('exchanges', 'finaltrade.exchange_id', '=', 'exchanges.id')
        ->where('finaltrade.user_id', $user_id)
        ->whereTime(DB::raw('IF(finaltrade.buy_datetime<finaltrade.sell_datetime, finaltrade.buy_datetime, finaltrade.sell_datetime) '), '<=', DB::raw('exchanges.close_time'))
        ->whereTime(DB::raw('IF(finaltrade.buy_datetime<finaltrade.sell_datetime, finaltrade.buy_datetime, finaltrade.sell_datetime) '), '>=', DB::raw("SUBTIME(exchanges.close_time, '01:00:00')"))
        ->get();


    $other_hours = DB::table('finaltrade')
        ->select(DB::raw('count(*) as other'))
        ->join('exchanges', 'finaltrade.exchange_id', '=', 'exchanges.id')
        ->where('finaltrade.user_id', $user_id)
        ->whereRaw('finaltrade.created_at NOT BETWEEN exchanges.start_time AND DATE_ADD(exchanges.start_time, INTERVAL 1 HOUR)')
        ->whereRaw('finaltrade.created_at NOT BETWEEN exchanges.close_time AND DATE_SUB(exchanges.close_time, INTERVAL 1 HOUR)')
        ->get();

    $data = [$first_hour,$last_hour,$other_hours];
    return response()->json($data );
}

上述功能的

OUTPUT ：

[[{"first":1}],[{"last":0}],[{"other":4}]]

我想删除数组中的数组，我在函数中执行的操作是什么？

Answer 1

如果您的查询结果为单行我认为是，因为您之前没有使用群组，那么您可以使用first()代替get()

输出

[{"first":1},{"last":0},{"other":4}]

Answer 2

<?php
$prefs = 
[
    ['fruit' => 'banana'],
    ['nut' => 'pecan'],
    ['pasta' => 'fusili']
];

$flatter = array_merge(...$prefs);
var_export($flatter);

输出：

array (
  'fruit' => 'banana',
  'nut' => 'pecan',
  'pasta' => 'fusili',
)

如何从Variable中删除数组中的数组？

2 个答案: