Open Graph addition for WP.

gistfile1.txt

/*** HEADER ***/
add_action('wp_head','msdlab_add_open_graph_meta',1);

/**
 * Add new image sizes
 */
add_image_size('facebook', 200, 200, TRUE);
add_image_size('linkedin', 180, 110, TRUE);

/**
 * Add open graph data, if it's not already being added by another plugin.
 */
 function msdlab_add_open_graph_meta(){
     $ret = '';
     if(is_cpt('post') && is_single()){
         global $post, $wpseo;
         remove_action('wpseo_opengraph',array($GLOBALS['wpseo_og'],'image'),30);
         if(wpseo_get_value( 'opengraph-image' )){ //yoast defined
            $attachment_id = get_attachment_id_from_src(wpseo_get_value( 'opengraph-image' ));
         } elseif(has_post_thumbnail($post->ID)){ //featured image
             $attachment_id = get_post_thumbnail_id($post->ID);
         } else {
            $args = array(
                'post_type' => 'team_member',
                'meta_key'  => '_team_member__team_user_id',
                'meta_value'=> $post->post_author,
            );
            $author_bio = array_pop(get_posts($args));
            if($author_bio){
                $attachment_id = get_post_thumbnail_id($author_bio->ID);
            } else {
                $attachment_id = get_option('msdsocial_default_avatar');
            }
         }
         if($attachment_id){
             $sizes = array('linkedin','facebook');
             foreach($sizes AS $size){
                 $image = wp_get_attachment_image_src($attachment_id,$size);
                 $ret .= '
<meta property="og:image" content="'.$image[0].'" /> <!-- '.$image[1].'x'.$image[2].' Image for '.$size.' -->
<meta property="og:image:width" content="'.$image[1].'" />
<meta property="og:image:height" content="'.$image[2].'" />';
             }
         }
     }
     print $ret;
 }