laravel 5.3 中的错误“在 null 上调用成员函数 getClientOriginalExtension()”？

Question

我正在对图像上传功能使用干预，但是当我尝试从邮递员上传带有标题中“内容类型：多部分/表单数据”的图像时，它会显示上述错误，但如果我删除内容类型标题然后它工作正常。我添加了邮递员的图像。

我的路线

Route::post('contact/image/upload',['as'=>'intervention.postresizeimage','uses'=>'contactController@upload_image']);

控制器中的代码

public function upload_image(Request $request){

      if((preg_match("/^[789]\d{9}$/", $request->header('UID')))){

        $photo = $request->file('image');
        $imagename = time().'.'.$photo->getClientOriginalExtension(); 

        $destinationPath_thumb = storage_path('images/thumbnail_images');
        $thumb_img = Image::make($photo->getRealPath())->resize(100, 100);
        $thumb_img->save($destinationPath_thumb.'/'.$imagename,80);

        $destinationPath_medium = storage_path('images/medium_images');
        $medium_img = Image::make($photo->getRealPath())->resize(500, 500);
        $medium_img->save($destinationPath_medium.'/'.$imagename,80);

        $destinationPath_original = storage_path('images/original_images');
        $photo->move($destinationPath_original, $imagename);

        $user = \App\User::select(['inst_id'])->where('mobile','=',$request->header('UID'))->first();

        $update_img = \App\Contact::where([['id','=',$request->ID],['inst_id','=',$user->inst_id]])->update(['image'=>$imagename]);

        if($update_img)
          $response = response()->json(['data'=>[], 'error'=>0,  'error_msg'=>'', 'message'=>'Profile updated']);
        else
          $response = response()->json(['data'=>[], 'error'=>1,  'error_msg'=>'some went wrong', 'message'=>'Please try again']);
      }
      else
         $response = response()->json(['data'=>[], 'error'=>1,  'error_msg'=>'wrong mobile in UID header','message'=>'wrong mobile no. in header']);

    return  $response;

  }

Answer 1

您的输入中缺少文件，因此它变为空，因此建议 检查输入请求是否有文件并继续否则返回 错误。

还有在你HTML表单中添加这个

<form enctype="multipart/form-data">

或者如果你使用 laravel 集体，那么在表单中添加 'files'=> true

我已经更新了你的代码来检查文件是否存在于下面

public function upload_image(Request $request){

  if((preg_match("/^[789]\d{9}$/", $request->header('UID')))){

    if(!$request->hasFile('image')) {

      return response()->json(['data'=>[], 'error'=>1,  'error_msg'=>'image file is required', 'message'=>'image file is required for upload']);
    }

    $photo = $request->file('image');
    $imagename = time().'.'.$photo->getClientOriginalExtension(); 

    $destinationPath_thumb = storage_path('images/thumbnail_images');
    $thumb_img = Image::make($photo->getRealPath())->resize(100, 100);
    $thumb_img->save($destinationPath_thumb.'/'.$imagename,80);

    $destinationPath_medium = storage_path('images/medium_images');
    $medium_img = Image::make($photo->getRealPath())->resize(500, 500);
    $medium_img->save($destinationPath_medium.'/'.$imagename,80);

    $destinationPath_original = storage_path('images/original_images');
    $photo->move($destinationPath_original, $imagename);

    $user = \App\User::select(['inst_id'])->where('mobile','=',$request->header('UID'))->first();

    $update_img = \App\Contact::where([['id','=',$request->ID],['inst_id','=',$user->inst_id]])->update(['image'=>$imagename]);

    if($update_img)
      $response = response()->json(['data'=>[], 'error'=>0,  'error_msg'=>'', 'message'=>'Profile updated']);
    else
      $response = response()->json(['data'=>[], 'error'=>1,  'error_msg'=>'some went wrong', 'message'=>'Please try again']);
  }
  else
     $response = response()->json(['data'=>[], 'error'=>1,  'error_msg'=>'wrong mobile in UID header','message'=>'wrong mobile no. in header']);

return  $response;

}