linux - permissions on upload folder not working

I have a php script which uploads images to a folder.

I have these permissions on the upload folder:

  drwxrwxr--  4 user user   4096 2010-06-02 16:20 temp_images

Shouldn't these permissions be enough for files to be uploaded to the folder?

But this doesn't work.

It only works when I set the permissions to 777.

"user" is added to the www-data group, still no luck.

Any ideas why?

Answer

Your folder is owned by the user and group user. If apache is running as a different account, perhaps www-data then apache will not be able to write there. Adding the user account to the www-data group would mean that user is permitted to write in folders that the www-data group owns and is set for rw. If you want apache to write to the folder the group user owns the apache service account must be a member of the user group.