Laravel：文件上传不起作用
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Laravel: File upload not working
提问by Raj Mehta
I'm trying to upload an image via an HTML form in Laravel 5.5. I have included the enctype="multipart/form-data"attribute, still nothing happens.
我正在尝试通过 Laravel 5.5 中的 HTML 表单上传图像。我已经包含了该enctype="multipart/form-data"属性，但仍然没有任何反应。
Form code:
表格代码：
<form method="POST" enctype="multipart/form-data">
{{ csrf_field() }}
<div class="form-group">
<label for="m_photo" class="col-md-4 control-label">Main photo</label>
<div class="col-md-6">
<input id="m_photo" type="file" class="form-control-file space" name="m_photo" required>
</div>
</div>
<div class="form-group">
<div class="col-md-6 col-md-offset-4">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>
</form>
Route (web.php) code:
路由（web.php）代码：
Route::post('smartphones/entry', 'HomeController@s_submit')->name('s_submit');
Controller code:
控制器代码：
public function s_submit() {
if (Input::hasFile('m_photo')) {
// doing something
}
else {
echo 'Nothing happened';
}
}
'Nothing happened' is echoed out when I submit the form.
当我提交表单时，“什么也没发生”被回显出来。
It's interesting that when I do this:
有趣的是，当我这样做时：
public function s_submit(Request $request) {
$input = Input::all();
dd($input);
}
I see:
我懂了：
array:1 [
"m_photo" => UploadedFile {#210 ?}
]
It's like the image isgetting passed, but I'm unable to retrieve it. Please help.
就像图像被传递了一样，但我无法检索它。请帮忙。
采纳答案by Laerte
This can happen when PHP max_file_size is not set to a size that allows the file you are trying to upload to be sent. This causes hasFilereturns false, when, for example, file->getClientOriginalName()works.
当 PHP max_file_size 未设置为允许您尝试上传的文件被发送的大小时，就会发生这种情况。这会导致hasFile返回 false，例如，当file->getClientOriginalName()有效时。
Try to check upload_max_filesizeor post_max_sizein your php.ini, or try with a smaller file to check if it works.
尝试检查upload_max_filesize或post_max_size在您的 php.ini 中，或尝试使用较小的文件来检查它是否有效。
回答by Alexey Mezenin
Get the file with:
获取文件：
$file = $request->m_photo;
Or with:
或与：
$file = $request->file('m_photo');
https://laravel.com/docs/5.5/requests#retrieving-uploaded-files
https://laravel.com/docs/5.5/requests#retrieving-uploaded-files
回答by Sohel0415
if (Input::hasFile('m_photo')) {
$destinationPath = '/uploads/app/';
$file = $request->file('m_photo');
$filename = $file->getClientOriginalName();
$file->move(public_path() . $destinationPath, $filename);
$filename_to_save_in_db = $destinationPath . $filename;
}
回答by Ilya Yaremchuk
Try this:
尝试这个：
public function s_submit()
{
request()->validate([
'm_photo' => 'required|image|mimes:jpeg,png,jpg,gif,svg|max:2048',
]);
$imageName = time().'.'.request()->m_photo->getClientOriginalExtension();
request()->m_photo->move(public_path('images'), $imageName);
return back()
->with('success','You have successfully upload image.')
->with('m_photo',$imageName);
}
Blade:
刀刃：
{!! Form::open(array('route' => 's_submit','files'=>true)) !!}
<div class="form-group">
<label for="m_photo" class="col-md-4 control-label">Main photo</label>
<div class="col-md-6">
{!! Form::file('m_photo', array('class' => 'form-control-file space')) !!}
</div>
</div>
<div class="form-group">
<div class="col-md-6 col-md-offset-4">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>
{!! Form::close() !!}
回答by Saurabh Mistry
You have forgot to put action in Your html Form :
您忘记在您的 html 表单中添加操作：
put action="/smartphones/entry" or action="{{route('s_submit')}}"
put action="/smartphones/entry" 或 action="{{route('s_submit')}}"
<form method="POST" enctype="multipart/form-data" action="{{route('s_submit')}}">
{{ csrf_field() }}
<div class="form-group">
<label for="m_photo" class="col-md-4 control-label">Main photo</label>
<div class="col-md-6">
<input id="m_photo" type="file" class="form-control-file space" name="m_photo" required>
</div>
</div>
<div class="form-group">
<div class="col-md-6 col-md-offset-4">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>
</form>
Create images folder in public folder
在公共文件夹中创建图像文件夹
in your controller
在你的控制器中
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
public function s_submit(Request $request) {
if($request->hasFile('m_photo')){
$filenameWithExt=$request->file('m_photo')->getClientOriginalName();
$filename=pathinfo($filenameWithExt,PATHINFO_FILENAME);
$extension=$request->file('m_photo')->getClientOriginalExtension();
$fileNameToStore=$filename.'_'.time().'.'.$extension;
request()->m_photo->move(public_path('images'), $fileNameToStore);
}
else{
$fileNameToStore='noimage.jpg';
}
}
回答by Dawood Najam
For future visitors, the accepted answer is the right answer.
I wanted to share one more thing.
I also faced similar issue and I had set the upload_max_filesizeand post_max_sizevariables to 20M, which was quite enough.
But I still faced the issue. So, I increased to 500M, then it worked.
It was really strange because I was uploading a file of less than 1 MB size.
对于未来的访问者，接受的答案就是正确的答案。我想再分享一件事。我也遇到了类似的问题，我将upload_max_filesize和post_max_size变量设置为 20M，这已经足够了。但我仍然面临这个问题。所以，我增加到500M，然后它起作用了。这真的很奇怪，因为我上传了一个小于 1 MB 的文件。
