Since file-upload is handled on RR end PHP process will only receive the filename of temporary resources.
This resource would not be registered in
uploaded files hash and, as a result, function
is_uploaded_file will always return
Please note that you should not use any of the following methods
exit. Use buffered output if your library requires writing content to stdout.
Using roadrunner on Windows with the WinCache extension might cause the worker bytecode to get stuck in memory.