通过$ _FILES ['file'] ['tmp_name']上传后立即引用文件

Question

I have a method that successfully uploads local files to an S3 bucket using the amazon SDK, all I need is a valid local path/to/file, which is the second param below:

$this->saveToAmazon($pathOnS3,$filename);

These local files are uploaded by the user and handled using the $_FILES global. Once the user uploads, we are copying to a local uploads folder via move_uploaded_file(). From there, we are calling the above function. This works fine, although this got me thinking.

Since for the life of the request, the file can be accessed temporarily via $_FILES['file']['tmp_name'], is it possible to 'hack' together a temporary valid file path to provide the saveToAmazon() function without having to call move_uploaded_file() and using the local uploads folder? essentially tapping in to the local php/tmp directly?