opengraph-image-from-featured-inline-or-attached.php

<?
function return_a_damn_image() {
	global $post;
	
	// try to get featured image
	$ftr = wp_get_attachment_image_src( get_post_thumbnail_id( get_the_ID()), 'medium' );
	
	// try to get posts from post_content
	preg_match_all('/< *img[^>]*src *= *["\']?([^"\']*)/i',$post->post_content, $result);
	
	// try to get attached media
	$get_attached_images = get_attached_media('image',get_the_ID());
	foreach ($get_attached_images as $aattacheditem) {
	  $attached_img = wp_get_attachment_image_src($aattacheditem-&gt;ID,'medium');
	  break;
	}
	
	// let's see: if featured image
	if (is_single() && isset($ftr[2]))
	  $image = $ftr[0];
	
	// if an image from post_content
	elseif (isset($result[1][0]))
	  $image = $result[1][0];
	
	// if an image from an attached image (gallery)
	elseif (isset($attached_img[2]))
	  $image = $attached_img[0];
	
	// nothin! let's go default image
	else
	  $image = get_bloginfo('stylesheet_directory')."/logo.png";
	
	return $image; // send image back
}
?>