Simple script to add obvious Facebook Open Graph attributes to Wordpress posts.

fb-og-wp.php

<?php
function fbOg()
{
	if (is_single())
	{
		global $post;
		
		$images = preg_split("/\"/", get_the_post_thumbnail( $post->ID, 'thumbnail' ));
		$first_image = isset($images[5]) ? $images[5] : 'http://example.com/blogLogo.jpg'; // Hardcoded fallback.
		
		$attrs = array(
			"title"		=> the_title(null, null, false),
			"url"		=> get_permalink($post),
			"site_name"	=> get_bloginfo('name'),
			"description"=>get_bloginfo('description'),
			"image"		=> $first_image,
			"type"		=> "article",
			"admins"	=> "505178361,285902231,100000848644298"
		);
		
		foreach ($attrs as $k => $v)
		{
			echo('<meta property="og:'.$k.'" content="'.$v.'" />'."\n");
		}
	}
}

add_action('wp_head', 'fbOg');
?>