Multiple images presented as a single image with html?

Question

I have a webpage that is presenting multiple images stuck together that appear as a single image (currently, in a table with no borders or gaps between the images). The images come from different sites and change somewhat regularly (I don't have any control over them). I would like the viewers of my site to be able to right click on the image and save it as a single image.

Some additional details/caveats... I'm generating the html from php. Some of the images come from sites that require username/passwords and the user will have to already have logged into those sites so that they're able to view the images. I don't want the users to have to provide me with their username&passwords (they probably don't either), so I don't think having php do the stitching is an option.

As an extra bonus, I'd like the default filename to be generated from my php, so if there's a way to set that, that'd be great.

Thanks.

Anonymous · Accepted Answer

If you don't need to go too far back in browser archaeology, this sounds like just the thing the <canvas> tag might help with.

Anonymous · Answer

You should be able to use an external file to create an image using PHP, and if you're accessing the image right now without requiring their passwords you should be able to use that same url. You're probably going to want to look at the GD library a little more - dynamic images can be an amazing thing, it just takes a little familarity with some relatively simple functions.

Research, specifically, the functions that you're going to need - imagecreatefromgif (or png, jpeg, etc) and imagecopymerge being the main ones. Using this you can call the various parts of the image remotely and then merge it into one file that your users can then download as is. Definition of the filename will I believe only work if you're saving it, and in that case you'd need to provide a way for it to be updated either manually or on a scheduled basis. Otherwise, the name of the image file will be the same as the php file that creates it.

Try using this tutorial, or doing a web search for another tutorial on those functions.
http://www.lateralcode.com/manipulating-images-using-the-php-gd-library/

? · Answer

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Multiple images presented as a single image with html?

3 Answers