How to tag multiple friends into single image?

What's the simplest way to add an OpenGraph image tag to your posts for Facebook?

• I don't need a full Like button implementation, or really any OpenGraph tag other than the image.  (I've got ShareThis handling the "Like" button, and the title and meta description are sufficient for now).  What I'm looking for is a plugin that will automatically choose the first image from the content (if present), and maybe have a fallback image if the individual post or page doesn't have one. Being able to choose a specific image would be nice as well, but I've got two blogs with a combined backlog of over 4,000 posts, and I don't want to use a plugin that requires me to set the image manually on every single post. I can write one if I have to, but I don't want to reinvent the wheel if it's already out there, and besides, it's a matter of finding the time. Thanks!

• Answer:

  From where I stand on this topic you have two choice: 1) Implement what mentioned at:Optimising the Facebook Open Graph Protocol http://yoast.com/facebook-open-graph-protocol/ Adding some Necessary Facebook Open Graph Tags: <meta property="og:title" content="<?php the_title(); ?>"/> <meta property="og:description" content="<?php   if ( function_exists('wpseo_get_value') ) {     echo wpseo_get_value('metadesc');   } else {     echo $post->post_excerpt;   } ?>"/> <meta property="og:url" content="<?php the_permalink(); ?>"/> <meta property="og:image" content="<?php echo get_fbimage(); ?>"/> <meta property="og:type" content="<?php   if (is_single() || is_page()) { echo "article"; } else { echo "website";} ?>"/> <meta property="og:site_name" content="<?php bloginfo('name'); ?>"/> Put the code above in your theme's header.php Generating the best Image Thumbnail function get_fbimage() {   $src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), '', '' );   if ( has_post_thumbnail($post->ID) ) {     $fbimage = $src[0];   } else {     global $post, $posts;     $fbimage = '';     $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i',     $post->post_content, $matches);     $fbimage = $matches [1] [0];   }   if(empty($fbimage)) {     $fbimage = "http://mydomain.com/default-image.jpg";   }   return $fbimage; } put the code above in your theme's function.php make sure you update the default-image.jpg to something relevant for your site. or 2) Wait for WordPress SEO Plugin (http://yoast.com/wordpress/seo/) to be updated.