staylor / WordPress

	 * Honor the value of UPLOADS. This happens as long as ms-files rewriting is disabled.

	 * We also sometimes obey UPLOADS when rewriting is enabled -- see the next block.

	 */

	if ( defined( 'UPLOADS' ) && ! ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) ) {

		$dir = ABSPATH . UPLOADS;

		$url = trailingslashit( $siteurl ) . UPLOADS;

	}

	// If multisite (and if not the main site in a post-MU network)

	if ( is_multisite() && ! ( is_main_network() && is_main_site() && defined( 'MULTISITE' ) ) ) {

			$dir .= $ms_dir;

			$url .= $ms_dir;

		} elseif ( defined( 'UPLOADS' ) && ! ms_is_switched() ) {

			/*

			 * Handle the old-form ms-files.php rewriting if the network still has that enabled.

			 * When ms-files rewriting is enabled, then we only listen to UPLOADS when:

			 * 1) We are not on the main site in a post-MU network, as wp-content/uploads is used

			 *    there, and

			 * 2) We are not switched, as ms_upload_constants() hardcodes these constants to reflect

			 *    the original blog ID.

			 *

			 * Rather than UPLOADS, we actually use BLOGUPLOADDIR if it is set, as it is absolute.

			 * (And it will be set, see ms_upload_constants().) Otherwise, UPLOADS can be used, as

			 * as it is relative to ABSPATH. For the final piece: when UPLOADS is used with ms-files

			 * rewriting in multisite, the resulting URL is /files. (#WP22702 for background.)

			 */

			if ( defined( 'BLOGUPLOADDIR' ) )

				$dir = untrailingslashit( BLOGUPLOADDIR );

			else

				$dir = ABSPATH . UPLOADS;

			$url = trailingslashit( $siteurl ) . 'files';

		}

	}

	$basedir = $dir;