readfile function in php support 206 Partial content? How to give files by script?

Question

PHP

readfile function in php support 206 Partial content?
If not, how is it better to give large files with a script so as not to overflow the memory?
Reading and issuing in portions using fread () with preliminary disabling of buffering ob_end_clean () is a normal solution?

Answer 1

https://habrahabr.ru/post/151795/