Laravel永远不会下载工作和页面加载

Question

我正在使用Barryvdh/DomPDF软件包以PDF格式下载页面，但每当我点击按钮下载时，页面都会永久加载而且无法下载。然后我被迫重新启动计算机。我不知道是什么造成的。

我的观点：

<a href="{{url('finance/invoice/printPdf/'.$detail->id) }}" class="btn btn-success">Download PDF</a>

我的控制器：

public function printPdf($id){
        //Print this page in PDF
        $details = DB::select("select a.id as id, b.name as subsidiary, c.name as client, due_date, invoice_date, invoice_number, order_number,
        sub_total, tax, grand_total, notes from sys_invoices as a, sys_organizations as b, sys_clients as c
        where a.subsidiary_id = b.id and a.client_id = c.id and a.id = '$id'");
        //Get items
        $items = DB::select("select * from sys_items where invoice_id = '$id'");
        $pdf = PDF::loadView('invoice.invoice', compact('details', 'items'));
        return $pdf->download('invoice.pdf');
    }