Yii2的sendfile（）顯示一些字符，而不是下載

Question

我有控制器代碼：

public function actionDownload($id) { 
 

 
     $download = Status::findOne($id); 
 

 
     $path = Yii::getAlias('@webroot').'/uploads/status/'.$download->image_web_filename; 
 

 
     if (file_exists($path)) { 
 
      return Yii::$app->response->SendFile($path,$download->image_src_filename); 
 
      
 
      exit; 
 
     } else { 
 
      throw new NotFoundHttpException("can't find {$download->image_src_filename} file"); 
 
     } 
 
    }

我在GridView視圖代碼：

['attribute'=>'Download', 
 
     'format'=>'raw', 
 
     'value' => function($data) 
 
     { 
 
     return 
 
     Html::a('Download file', ['status/download','id'=>$data->id],['class' => 'btn btn-primary']); 
 

 
     } 
 
     ],

這是關於屏幕的屏幕，PDF顯示什麼時候我刷新瀏覽器只下載但仍保留在屏幕上有什麼問題？：

%PDF-1.4 %�쏢 5 0 obj <> stream x��]K�%ECű%P4���y��.�u�@�Q �zt��P�0��_��'��gx����/3�n���zܞ���xaAR7o�s�<�;�����܈�o��w?8��]�y�/'�O�FU��@b㍤���G����͇'r����4�+B��{3���SW����'��<�������A�ǃ*x���N27r�$���V������w�_?��k�~���+�'wFr6��f! ��ȍ7�Ӡ���UG���g;=�2�j��Ǒ �oƱQƇfh�?�WҘ�0۟��/�l�E���i(�{��* ��'�W��8��T�j 2��p������\��aܵH�$�Ci��u��$j��QZ���aIk����\o���D2Y)�/FV��nġ�a����� �_ؐ��rf�� �7�*� �IN�J{�l����Cqr�D�������[�]9���E�7�����k�j���9N�\�EC��F����&ռ-����uJV����3����L!�f��x���F�����̈́��#��U����:*g��&C�ӤD��q�17�@Jg+�J����w��ߨ?M_�a���R�ݼ��zu%��\�#�7$M&���-dO"#�]�i�89�}��<��� m��04�I�bHJ �O�M��`f�Ϯ�E�{2}`���n�����.l���+cZ?�����6C��N��XZJW�ylȒ��"�D�ͧ�8s���q��o׉m��ݍx�6(��T�9Uɨ�g���x���\���'�Ͻ����BE��|��� p���9P]��R*����C��������jC�m���1��#K���׶Y���rt=�:�x����W����qr�便p4��"��B�}=�2������p��!x+�)zv���̳���\^*�R�ugȎ!J<��q�~���C��/��ˏU8�C7A0`�6x����6ۗ#�b���Ħ�(��Sk̍�"|����9�" �G�`@LD���e�B�Q���� d��[q�Z�aځ��-j�����Zk�}F4���l���y�T ��B��|���ҕ~/����a�+�7��Ai=W���1�

Answer 1

它看起來像你需要標題。

嘗試使用此代碼：

public function actionDownload($id) { 
    header("Content-type:application/pdf"); 

........ 

如果不工作嘗試添加這頭太

header("Content-Disposition:attachment;filename='filename.pdf'"); 

Answer 2

，我曾在這個特定代碼的問題是，我不得不刪除 <?php Pjax::begin(); ?>和<?php Pjax::end(); ?>以及'pjax'=>true上面和gridview列中，所以它的工作我沒有改變任何東西在actionDownload($id)代碼

編輯前（原始錯誤代碼） `................................... 。

<h3><?= Html::encode($this->title) ?></h3> 

<p> 
    <?= Html::a('Create Status', ['create'], ['class' => 'btn btn-success']) ?> 
</p> 
<?php Pjax::begin(); ?> 

<?php 

$gridColumns = [ 
['class' => 'kartik\grid\SerialColumn'], 
'id', 
'message', 
'permissions', 
'created_by', 
'created_at', 
// 'updated_at', 
// 'image_src_filename', 
//'image_web_filename', 

['attribute'=>'Download', 
    'format'=>'raw', 
    'value' => function ($data) { 
     return 
     Html::a('Download file', ['status/download','id'=>$data->id], ['class' => 'btn btn-primary']); 
    } 
    ], 
]; 
?> 
<?php 
$export = ExportMenu::widget([ 
'dataProvider' => $dataProvider, 
//'columns' => $gridColumns, 
'fontAwesome' => true, 
'exportConfig' => [ 
ExportMenu::FORMAT_HTML => false, 
ExportMenu::FORMAT_TEXT => false, 
ExportMenu::FORMAT_CSV => false, 
ExportMenu::FORMAT_EXCEL => false, 
ExportMenu::FORMAT_EXCEL_X => false, 
], 
]); 
?> 

<?php 
echo GridView::widget([ 
'dataProvider' => $dataProvider, 
'filterModel' => $searchModel, 
'columns' => $gridColumns, 
'containerOptions' => ['style' => 'overflow: auto'], // only set when $responsive = false 
'toolbar' => [ 
$export 
], 
'pjax' => true, 
'bordered' => true, 
'striped' => true, 
'responsive' => true, 
'floatHeader' => true, 
'panel' => [ 
'type' => GridView::TYPE_PRIMARY, 
'heading' => 'Forms Uploaded by Clients.', 
], 
]); 
?> 

<?php Pjax::end(); ?></div>` 

編輯（原始錯誤代碼）後

`

<h3><?= Html::encode($this->title) ?></h3> 

<p> 
    <?= Html::a('Create Status', ['create'], ['class' => 'btn btn-success']) ?> 
</p> 

<?php 

$gridColumns = [ 
['class' => 'kartik\grid\SerialColumn'], 
'id', 
'message', 
'permissions', 
'created_by', 
'created_at', 
// 'updated_at', 
// 'image_src_filename', 
//'image_web_filename', 

['attribute'=>'Download', 
    'format'=>'raw', 
    'value' => function ($data) { 
     return 
     Html::a('Download file', ['status/download','id'=>$data->id], ['class' => 'btn btn-primary']); 
    } 
    ], 
]; 
?> 
<?php 
$export = ExportMenu::widget([ 
'dataProvider' => $dataProvider, 
//'columns' => $gridColumns, 
'fontAwesome' => true, 
'exportConfig' => [ 
ExportMenu::FORMAT_HTML => false, 
ExportMenu::FORMAT_TEXT => false, 
ExportMenu::FORMAT_CSV => false, 
ExportMenu::FORMAT_EXCEL => false, 
ExportMenu::FORMAT_EXCEL_X => false, 
], 
]); 
?> 

<?php 
echo GridView::widget([ 
'dataProvider' => $dataProvider, 
'filterModel' => $searchModel, 
'columns' => $gridColumns, 
'containerOptions' => ['style' => 'overflow: auto'], // only set when $responsive = false 
'toolbar' => [ 
$export 
], 
'bordered' => true, 
'striped' => true, 
'responsive' => true, 
'floatHeader' => true, 
'panel' => [ 
'type' => GridView::TYPE_PRIMARY, 
'heading' => 'Forms Uploaded by Clients.', 
], 
]); 
?>` 

這就是全部！我發現。