PHP, WP, Get the first image inserted into a post body

get_first_inserted_image

/**
 * Get the first image inserted into a post body
 */
function get_first_inserted_image()
{
    global $post, $posts;
    preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
    $first_img = $matches [1] [0];
    // Spew it out as an imege
    $first_img = '<img alt="Blog Post Image" src="' . $first_img . '">';
    return $first_img;
}