basic use exif edit and read using simple php with no cli

[Yonatan Wishniak]

I like to learn and use PEL for editing jpeg exif in all formats using only php and javascript fo ajax.
but i see no simple example to show me how to edit the image with no cli.
I built a simple php page that with ajax uploads an image to the server, i would like that the code would read and present the user all the exif on a web page for him to read and edit.
Can anyone point me to a simple edit and read example i can use?