php - Laravel5.0 : while passing variable in query function, 它显示 undefined variable

Question

我正在尝试在查询中传递一个变量。但出现错误:“ undefined variable $month”

这是我的 Controller 部分

public function due(Request $request){

    if (strtoupper($_SERVER['REQUEST_METHOD']) == 'POST') {

        $month = $request->month;
        if(isset($month)) {
            try {
                $val=DB::connection()->getDatabaseName();
                if(DB::connection()->getDatabaseName()) {
                    $month=$month;
                    $bRecord=DB::table('clients')->whereNotIn('ClientID', function($q){
                        $q->select('ClientID')->from('bills')
                            ->where(function ($query) use($month) {  //it shows $month is undefined, but why ??
                                $query->whereMonth('Date', '=', $month);
                            });
                    })->paginate(10);
                    return view('bills.dueRecord')->with('bRecord', $bRecord);
                }else{
                    $er="/connection status: database error";
                    return view('home')->with('error',$er);         //'error' is passed to home
                }

            } catch (\Exception $e){
                $er="/connection status: database error";
                return view('errors/503')->with('error',$er);
            }
        }

    }else{


    }

Answer 1

得到了我的答案。我只需要在查询中传递 $month 的范围两次。

$bRecord=DB::table('clients')->whereNotIn('ClientID', function($q) use($month){
                        $q->select('ClientID')->from('bills')
                            ->where(function ($query) use($month) {
                                $query->whereMonth('Date', '=', $month);
                            });
                    })->paginate(10);