Advice about pictures/images

[murfitUK]

I'm experimenting with php and sql and all that. I think this question is more to do with the html output though.I've got a folder with 30 jpgs in it of varying sizes 01.jpg, 02.jpg etc. Using a php script I've got a left container with thumbnails by specifying width='50' in the img tag, and added a <a href ... for each pic. When clicked, the relevant picture opens up in the right container.Everything works fine but I would like to limit the main container picture to something like 500px to reduce the amount of scrolling that would be needed to view the larger pictures.Setting width='500' is fine for pictures of 500+ pixels, but if a pic is smaller then that it obviously enlarges the picture which results in pixellating.Is there a way to detect the size of an image when calling the file and somehow using it to determine if the width needs to be set egprint "<img src='{$picNum}.jpg' ";if (picWidth>500) print "width='500' ";print "/>";but I don't know how to find the width of the pic.Any suggestions? Is there an easier way of doing it?

[justsomeguy]

You would need to use PHP to do this. See this function, there are several examples on the page you can use as well:http://www.php.net/manual/en/function.getimagesize.phpThe function will also return the image type and other file attributes.