upload plugin works excellent for me, but when I have multiple file upload-> select 30 images (approx 15 MB) -> Upload only 18-20 images. May be issued with a number of files. post_max_size I have updated from 8M to 20M in php.ini . I have solved the same by using dropzone.js instead of simple file upload.It has no issue upload 100 files at a time. Still want to know why simple file upload is not working?