PHP JPEG headers to stop image from downloading

Answer 1

Any particular reason why you can't just use http://us2.php.net/manual/en/function.imagejpeg.php

Answer 2

I can't say why Safari is treating your images as attachments/downloads. I actually tested it in the latest Safari 4 on SL and it works OK. You could try sniffing the HTTP conversation and make sure no extra headers (e.g. content-disposition) are creeping in. Also it may pay to check over Safari config settings, maybe something subtle is different there to your other browsers?

On the topic of performance:

First I would try to eliminate the PHP altogether. See if you can leverage your webserver's modules/configuration to achieve your goal.

If you can't do without the PHP, then you could try letting the webserver handle the actual delivery. You can do this in nginx with X-Accel-Redirect and in lighttpd and apache with X-Sendfile.