php FILE POST上传没有保存

I am using a plain text file in a PhP script. Is there any way to process the file in the PhP script without saving it locally? Everywhere I see simply uploading a file and saving it. I just need to pull some names off of the file and be done with it. I have everything else working if I use a local copy of the file, so saving it, then deleting it works. I was just wondering if there was a way to skip the saving a copy and just getting that information directly.I am using a plain text file in a PhP script. I