Obtén el permalink directo de imágenes subidas en WordPress

<?php echo wp_get_attachment_url(get_the_ID()); ?>

                        <?php 
						$files = get_children("post_parent=get_the_ID()&post_type=attachment&post_mime_type=image");
						if($files){
        				$keys = array_keys($files);
						$thumb=wp_get_attachment_image_src($keys[0], $size = 'thumbnail', $icon = false);
						?>
<img src="<?php echo $thumb[0]; ?>"  />
						<?php } ?>

						$files = get_children("post_parent=get_the_ID()&post_type=attachment&post_mime_type=image");

						$files = get_children("post_parent=".get_the_ID()."&post_type=attachment&post_mime_type=image");