CSV , JSON , EXCEL download in laravel

 protected function downloadCSV(Request $request){
        $table = UserAccount::orderBy('created_at','desc')->with('user')->get();
        $filename = "writers.csv";
        $handle = fopen($filename, 'w+');
        fputcsv($handle, array('user_name','user_email','mobile','account_no','account_holdername','account_type','bank_name','bank_ifsc_code','country','state','address','zip_code','city'));
        foreach($table as $row) {
            fputcsv($handle, array(
                $row['user']['name'],
                $row['user_email'],
                $row['mobile'],
                $row['account_no'],
                $row['account_holdername'],
                $row['account_type'],
                $row['bank_name'],
                $row['bank_ifsc_code'],
                $row['country'],
                $row['state'],
                $row['address'],
                $row['zip_code'],
                $row['city']
            ));
        }
        fclose($handle);
        $headers = array('Content-Type' => 'text/csv');
        return response()->download($filename, 'writers.csv', $headers);
    }

    protected function downloadJSON(Request $request){
         $table = UserAccount::orderBy('created_at','desc')->with('user:id,name')->get();
         $filename = "writers.csv";
         $handle = fopen($filename, 'w+');
         fputs($handle, $table->toJson(JSON_PRETTY_PRINT));
         fclose($handle);
         $headers = array('Content-type'=> 'application/json');
         return response()->download($filename,'writers.json',$headers);
    }

    protected function downloadEXCEL(Request $request){
        $table = UserAccount::orderBy('created_at','desc')->with('user:id,name')->get();
        $filename = "writers.xls";
        $handle = fopen($filename, 'w+');
        fputcsv($handle,array('user_name','user_email','mobile','account_no','account_holdername','account_type','bank_name','bank_ifsc_code','country','state','address','zip_code','city'));
        foreach($table as $row) {
            fputcsv($handle,array(
                $row['user']['name'],
                $row['user_email'],
                $row['mobile'],
                $row['account_no'],
                $row['account_holdername'],
                $row['account_type'],
                $row['bank_name'],
                $row['bank_ifsc_code'],
                $row['country'],
                $row['state'],
                $row['address'],
                $row['zip_code'],
                $row['city']
            ));
        } 

        fclose($handle);
        $headers = array('Content-type'=> 'application/vnd.ms-excel');
        return response()->download($filename,'writers.xls',$headers);
    }