function fb_opengraph() {
global $post;
if(is_single()) {
if(has_post_thumbnail($post->ID)) {
$img_src = wp_get_attachment_image_src(get_post_thumbnail_id( $post->ID ), 'medium');
} else {
$img_src = get_stylesheet_directory_uri() . '/img/opengraph_image.jpg';
}
if($excerpt = $post->post_excerpt) {
$excerpt = strip_tags($post->post_excerpt);
$excerpt = str_replace("", "'", $excerpt);
} else {
$excerpt = get_bloginfo('description');
}
?>
<meta property="og:title" content="<?php echo the_title(); ?>"/>
<meta property="og:description" content="<?php echo $excerpt; ?>"/>
<meta property="og:type" content="article"/>
<meta property="og:url" content="<?php echo the_permalink(); ?>"/>
<meta property="og:site_name" content="<?php echo get_bloginfo(); ?>"/>
<meta property="og:image" content="<?php echo $img_src; ?>"/>
<?php
} else {
return;
}
}
add_action('wp_head', 'fb_opengraph', 5);