Recently I came across a problem while installing SWFUpload on my latest site. I had the problem before but couldn’t remember what the solution was.

When I uploaded a file with SWFUpload on my mac (OSX 10.5) it would get stuck at the uploading… status

This was cause by my upload_url file not returning any text at all. Make sure when you set up the system that for every error case that some sort of output is displayed. And also on success.

In PHP I simply output the error message then die;

Bookmark and Share