如何使用php在Yii框架中仅上传pdf类型的文件

Question

我尝试使用CMultifileUpload小部件上传pdf类型的文件。这是我的表单代码：

<div class="row" id="file_upload" style="margin-left:20%; margin-bottom:2%;">
         <?php
            $this->widget('CMultiFileUpload',array(
                'name'        => 'files',
                'accept'      => 'pdf',
                'max'         => 1,
                'htmlOptions' => array('size' => 25),
            ));             
            echo CHtml::htmlButton('Upload',array(
            'onclick'=>'javascript: send();', // on submit call JS send() function
            'id'=> 'post-submit-btn', // button id 'newcreate'
            'class'=>'btn btn-primary',
        ));
        ?>

    </div>  

它会上载所有类型的文件。但是我只想使用此小部件上载pdf类型的文件。我该怎么办？有人可以帮助我提供代码示例。

Answer 1

在_form.php文件内部视图中：

$this->widget('CMultiFileUpload',[
       'model' => $model,
       'attribute' => 'pdf_file',
       'accept' => 'pdf',
       'file' => 'PDF file label',
       'max' => 1, 
       'remove' => 'Remove file',
       'htmlOptions' => ['accept' => 'application/pdf'],
       'denied' => 'ERROR. Incorrect format.', 
       'duplicate' => 'ERROR. Duplicated file'
  ]);

在Controller.php文件中（例如create动作）：

public function actionCreate(){
    $model = new FooModel;
    $this->performAjaxValidation($model);
    if(isset($_POST['FooModel'])){
      $model->attributes = $_POST['FooModel'];
      try{
        $pdf_files = CUploadedFile::getInstancesByName('FooModel');
        if (count($pdf_files) > 0) {
          foreach ($pdf_files as $file) {
            /*
             * $file->name: original name
             * $file->tempName: name in /temp
             * $file->type: e.g. image/png
             * $file->size: size/1024 => kbs
             * $file->error: 0 = no error
             * $file->extensionName
             */
            if (!$f->getHasError()) {
              if(strtolower($f->getExtensionName()) == 'pdf'){
                // do things with file
              }
              else{
                // set errors
                $model->setError('pdf_file', 'Incorrect format');
              }
            }else{
              echo 'Level file error';
            }
          }// foreach
        }// if files
      }
      catch(CDbException $e){
        throw new CHttpException(400, 'Some error');
      }
      catch(Exception $e){
        throw new CHttpException($e->getCode(), $e->getMessage());
      }
    }// if post
    $this->render('create', ['model' => $model]);
  }