Create an official Facebook Share this button:
Generate a share buttonhttps://developers.facebook.com/docs/plugins/share-button/
More information about open graph tags:
https://developers.facebook.com/docs/opengraph/howtos/maximizing-distribution-media-content
Add this to your HTML Tag:
<html xmlns:fb="http://ogp.me/ns/fb#">
Add these meta tags in between the <head> </head>:
<!-- Begin Facebook Meta Tags -->
<meta property="og:title" content="My Page Title" />
<meta property="og:url" content="http://www.myurl.com/" />
<meta property="og:image" content="http://www.myurl.com/images/someimage.png" />
<meta property="og:description" content="This is a description" />
<!-- End Facebook Meta Tags -->
Add this Javascript after the body:
<!-- Begin Facebook Button Javascript -->
<div id="fb-root"></div>
<script>
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<!-- End Facebook Button Javascript -->
Here is the actual button:
<fb:share-button href="http://www.myurl.com" type="button_count"></fb:share-button>
