Ticket #23073: 23073.4.diff

wp-admin/network.php

@@ -309 +309 @@
 function network_step2( $errors = false ) {
         global $wpdb;
 
+        $home_path         = get_home_path();
         $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 );
-        $wp_siteurl_subdir = trailingslashit( '/' . preg_replace( '#^' . preg_quote( $base, '#' ) . '#', '', $wp_dir_from_root ) );
+        $document_root     = str_replace( '\\', '/', realpath( $_SERVER['DOCUMENT_ROOT'] ) );
+        $sanitized_abspath = str_replace( '\\', '/', ABSPATH );
+        if ( false !== strpos( $sanitized_abspath, $document_root ) ) {
+                $wp_dir_from_root  = preg_replace( '#^' . preg_quote( $document_root, '#' ) . '#', '', $sanitized_abspath );
+                $wp_siteurl_subdir = trailingslashit( '/' . preg_replace( '#^' . preg_quote( $base, '#' ) . '#', '', $wp_dir_from_root ) );
+        } else {
+                $wp_siteurl_subdir = preg_replace( '#^' . preg_quote( $home_path, '#' ) . '#', '', ABSPATH );
+        }
         $rewrite_base      = ! empty( $wp_siteurl_subdir ) ? ltrim( trailingslashit( $wp_siteurl_subdir ), '/' ) : '';
 
-        $home_path         = get_home_path();
-
         $location_of_wp_config = ABSPATH;
         if ( ! file_exists( ABSPATH . 'wp-config.php' ) && file_exists( dirname( ABSPATH ) . '/wp-config.php' ) )
                 $location_of_wp_config = trailingslashit( dirname( ABSPATH ) );