Yii2 mpdf更改下载的文件名

我正在进行SiteController操作打印，这是我的代码

$pdf = new Pdf([
            // set to use core fonts only
            'mode' => Pdf::MODE_UTF8, 
            // A4 paper format
            'format' => Pdf::FORMAT_A4, 
            // portrait orientation
            'orientation' => Pdf::ORIENT_PORTRAIT, 
            // stream to browser inline
            'destination' => Pdf::DEST_BROWSER, 
            'marginTop' => 5,
            'marginLeft' => 5,
            // your html content input
            'content' => $content,  
            // format content from your own css file if needed or use the
            // enhanced bootstrap css built by Krajee for mPDF formatting 
            'cssFile' => '@vendor/kartik-v/yii2-mpdf/assets/kv-mpdf-bootstrap.min.css',
            // any css to be embedded if required
            'cssInline' => '.kv-heading-1{font-size:18px}', 
             // set mPDF properties on the fly
            'options' => ['title' => 'Customer Invoice'],
             // call mPDF methods on the fly
            'methods' => [ 
             //   'SetHeader'=>['Krajee Report Header'], 
               // 'SetFooter'=>['{PAGENO}'],
            ]
        ]);


        // return the pdf output as per the destination setting
        return $pdf->render();

当触发此操作时，它会在浏览器上呈现pdf，但当我单击“下载”按钮时，默认文件名为“打印”。我怎样才能改变它

---

请帮忙

您可以使用属性filename:string（输出PDF文件名）更改文件名

$pdf = new Pdf([
        // set to use core fonts only
        'mode' => Pdf::MODE_UTF8, 
        //Name for the file
        'filename' => 'The_name_you_want',
        // A4 paper format
        'format' => Pdf::FORMAT_A4, 
        // portrait orientation
        'orientation' => Pdf::ORIENT_PORTRAIT, 
        // stream to browser inline
        'destination' => Pdf::DEST_BROWSER, 
        'marginTop' => 5,
        'marginLeft' => 5,
        // your html content input
        'content' => $content,  
        // format content from your own css file if needed or use the
        // enhanced bootstrap css built by Krajee for mPDF formatting 
        'cssFile' => '@vendor/kartik-v/yii2-mpdf/assets/kv-mpdf-bootstrap.min.css',
        // any css to be embedded if required
        'cssInline' => '.kv-heading-1{font-size:18px}', 
         // set mPDF properties on the fly
        'options' => ['title' => 'Customer Invoice'],
         // call mPDF methods on the fly
        'methods' => [ 
         //   'SetHeader'=>['Krajee Report Header'], 
           // 'SetFooter'=>['{PAGENO}'],
        ]
    ]);


    // return the pdf output as per the destination setting
    return $pdf->render();

---

我可以知道此脚本的可能副本吗

'options'=>['title'=>'Customer Invoice']，

？我在文件中设置了这样的脚本，但在任何地方都没有显示客户服务。谢谢