Laravel和AWS PHP SDK——无法删除上传至S3的本地文件

I am trying to delete a file from a local directory right after I have uploaded it to AWS S3. When I run it on Vagrant I get an error = Text-file:busy, and when I run it on xampp I get the error :permission denied. For some reason the AWS S3 PutObject method is not releasing the file handle. I have tried to unset the s3 object but that didn't work.I am trying to delete a file from a local direc