Ticket #16953: mu-symlinks.diff

src/wp-includes/plugin.php

@@ -642 +642 @@
 function wp_register_plugin_realpath( $file ) {
         global $wp_plugin_paths;
 
-        $plugin_path = wp_normalize_path( dirname( $file ) );
-        $plugin_realpath = wp_normalize_path( dirname( realpath( $file ) ) );
+        $file = wp_normalize_path( $file );
+        $realfile = wp_normalize_path( realpath( $file ) );
 
+        $plugin_path = dirname( $file );
+        $plugin_realpath = dirname( $realfile );
+
+        if ( $plugin_path == wp_normalize_path( WP_PLUGIN_DIR ) || $plugin_path == wp_normalize_path( WPMU_PLUGIN_DIR ) ) {
+                $plugin_path = $file;
+                $plugin_realpath = $realfile;
+        }
+
         if ( $plugin_path !== $plugin_realpath ) {
                 $wp_plugin_paths[ $plugin_path ] = $plugin_realpath;
         }