I have a site for a client where he can upload images of goods for sale
(digital photo frames and baby monitors), and have just had an email from him
about images not displaying.

In the instances they don't display, I'm using a GD library based script to
show thumbnails of the original images.

You can see what I mean here :

http://www.pixelar.co.uk/monitors/vi...y-monitors.php

However, if you click through to the details page, and then on the image
itself, it displays fine.

Having looked into it, tried uploading other images, I can see nothing wrong.

I tried opening the JPG in FW to export it out as a new JPG to see what that
would do, but FW wouldn't open it - reporting it as an unknown file type.

One of the images is here :

http://www.pixelar.co.uk/images/819E...er%20only2.jpg

So I guess my question is what's the issue with the image, that's preventing
the GD script and FW from recognising it as a valid file type, even though its
a .JPG?

When a program tells you a file isn't the right type, it usually knows what
it's talking about. There's more to a format than an extension. You can put any
extension on a file you want, but that doesn't make it that format.

I opened your file in binary mode in my text editor. It didn't have any header
information at all. I then opened a file I know to be a .jpg. They looked
completely different. So, as an experiment, I changed the extension on your
file from .jpg to .bmp and dragged it into Fireworks. It opened just fine.

Your client needs to save his images as JPGs, not just change the
extension.

When a program tells you a file isn't the right type, it usually knows what
it's talking about. There's more to a format than an extension. You can put any
extension on a file you want, but that doesn't make it that format.

I opened your file in binary mode in my text editor. It didn't have any header
information at all. I then opened a file I know to be a .jpg. They looked
completely different. So, as an experiment, I changed the extension on your
file from .jpg to .bmp and dragged it into Fireworks. It opened just fine.

Your client needs to save his images as JPGs, not just change the
extension.

On Fri, 26 Sep 2008, pixlor wrote

> I opened your file in binary mode in my text editor. It didn't have
>any header information at all.

I think you would find it did. The first two bytes would be hex 424D
which is 'BM' in ASCII, and BM means BitMap format.

--
Richard Mason
http://www.emdpi.com

On Fri, 26 Sep 2008, pixlor wrote

> I opened your file in binary mode in my text editor. It didn't have
>any header information at all.

I think you would find it did. The first two bytes would be hex 424D
which is 'BM' in ASCII, and BM means BitMap format.

--
Richard Mason
http://www.emdpi.com

[q]Originally posted by: Newsgroup User
On Fri, 26 Sep 2008, pixlor wrote

> I opened your file in binary mode in my text editor. It didn't have
>any header information at all.

I think you would find it did. The first two bytes would be hex 424D
which is 'BM' in ASCII, and BM means BitMap format.

--
Richard Mason
http://www.emdpi.com
[/q]

:grin; Thanks Richard! I shall remember that! I guess I expect headers to be
more...extensive! Thanks also for the confirmation.

[q]Originally posted by: Newsgroup User
On Fri, 26 Sep 2008, pixlor wrote

> I opened your file in binary mode in my text editor. It didn't have
>any header information at all.

I think you would find it did. The first two bytes would be hex 424D
which is 'BM' in ASCII, and BM means BitMap format.

--
Richard Mason
http://www.emdpi.com
[/q]

:grin; Thanks Richard! I shall remember that! I guess I expect headers to be
more...extensive! Thanks also for the confirmation.