使用for循环的Laravel多个图像上传

问题描述：

I'm in a situation where I will have to upload some pictures based on user needs. A user may have 1, 2 or more then 3++ children. So I'm using a for loop while uploading his children images. Here is my form:

@for($i=1;$i<=$ticket->children_count;$i++)
    <div class="form-group">
      <label for="">Child {{ $i }} Name:</label>
      <input type="text" name="child_name_{{$i}}" value="" required="" class="form-control">
    </div>
    <div class="form-group">
       <label for="">Child {{ $i }} Photo:</label>
       <input type="file" name="child_picture_{{$i}}" value="" required="">
    </div>
 @endfor

I want to receive the file from backend but somehow I'm getting null. Here is the for loop inside the controller:

for ($i=1; $i <= $ticket->children_count ; $i++) {
            $file = $request->file("child_picture_.$i");
            dd($request->child_name_.$i);
}

The above code returns only the value of $i. How do I receive the file properly? It has to be something like child_name_1 or child_name_2 child_picture_1 or child_picture_3 etc.

答

You should replace the following:

dd($request->child_name_.$i);
// php thinks that you are providing two variables:
// $request->child_name_ and $i

To:

dd($request->{'child_name_'.$i});
// makes sure php sees the whole part
// as the name of the property

Edit

And for the file, replace:

$file = $request->file("child_picture_.$i");

To:

$file = $request->file("child_picture_" . $i);

答

Excuse me, but for multiple files you should use arrays (maintainability, readability), like this:

@for($i=1;$i<=$ticket->children_count;$i++)
<div class="form-group">
  <label for="">Child {{ $i }} Name:</label>
  <input type="text" name="child_names[]" value="" required="" class="form-control">
</div>
<div class="form-group">
   <label for="">Child {{ $i }} Photo:</label>
   <input type="file" name="child_pictures[]" value="" required="">
</div>
@endfor

And in your controller check the request has file like so:

if ($request->hasFile('child_pictures')) {
    $files = $request->file('child_pictures');

    foreach($files as $file) {
        var_dump($file); // dd() stops further executing!
    }
}

使用for循环的Laravel多个图像上传

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