Ticket #23073: 23073.patch

wp-admin/network.php

@@ -312 +312 @@
         $hostname          = get_clean_basedomain();
         $slashed_home      = trailingslashit( get_option( 'home' ) );
         $base              = parse_url( $slashed_home, PHP_URL_PATH );
-        $wp_dir_from_root  = preg_replace( '#^' . preg_quote( $_SERVER['DOCUMENT_ROOT'], '#' ) . '#', '', ABSPATH );
+        $document_root     = str_replace( '\\', '/', realpath( $_SERVER['DOCUMENT_ROOT'] ) );
+        $wp_dir_from_root  = preg_replace( '#^' . preg_quote( $document_root, '#' ) . '#', '', str_replace( '\\', '/', ABSPATH ) );
         $wp_siteurl_subdir = trailingslashit( '/' . preg_replace( '#^' . preg_quote( $base, '#' ) . '#', '', $wp_dir_from_root ) );
         $rewrite_base      = ! empty( $wp_siteurl_subdir ) ? ltrim( trailingslashit( $wp_siteurl_subdir ), '/' ) : '';