Content-disposition:inline header won't show images inline?
Try removing the Content-disposition header. By default, they should be displayed inline anyway.
Anyway, you should be doing something wrong. I've just tested in Opera and IE and they do indeed display the image inline with the content-disposition header. I used:
<?phpheader('Content-Disposition: inline');header('Content-type: image/png');readfile('Untitled.png');Use the dev tools of your browser to check the response header.
EDIT
Probably this bug is causing the problem:
<?phpecho substr( "file.ext", strrpos("file.ext", '.') );gives ".ext" not "ext". Substitute for strrpos() + 1.