I was curious to how I could make something similar to what Facebook does when you add a link. Somehow it loads images found on the page your link leads to, and then it presents them to you so you can select one you want to use as a thumbnail.
Well, step one to solve this is of course to find all the images on a page, and that is what I will present in this post. It will be sort of like a backend service we can use later from an AJAX call. You post it a URL, and you get all the image URLs it found back. Let’s put the petal to medal!