Facebook link inspector
<p>I'm building a website and am looking for a way to implement a certain feature that Facebook has. The feature that am looking for is the link inspector. I am not sure that is what it is called, or what its called for that matter. It's best I give you an example so you know exactly what I am looking for.</p>

<p>When you post a link on Facebook, for example a link to a youtube video (or any other website for that matter), Facebook automatically inspects the page that it leads you and imports information like page title, favicon, and some other images, and then adds them to your post as a way of giving (what i think is) a brief preview of the page to anyone reading that post.</p>

<p>I already have a feature that allows users to share a link (or URLs). What I want is to do something useful with the url, to display something other than just a plain link to a webpage, to give someone viewing a shared link (in the form if a post) some useful insight into the page that the url leads to. </p>

<p>What I'm looking for is a script, or tutorial, or at the very least someone to point me in the right direction, so that it can help me accomplish this (using PHP preferably). 
I've tried googling it but I don't know exactly what such a feature would be called and google isn't helpful when you don't exactly know what you're looking for.
I figure someone out there, in this vast knowledge basket called stackoverflow, can help me with this. Can anyone help me?</p>
