Ticket #32472: is_user_member_of_blog_(v4).diff

wp-includes/user.php

@@ -1234 +1234 @@
  * @return bool
  */
 function is_user_member_of_blog( $user_id = 0, $blog_id = 0 ) {
+        global $wpdb;
+
+        if ( ! is_multisite() ) {
+                return true;
+        }
+
         $user_id = (int) $user_id;
         $blog_id = (int) $blog_id;
 
-        if ( empty( $user_id ) )
+        if ( empty( $user_id ) ) {
                 $user_id = get_current_user_id();
+        }
 
-        if ( empty( $blog_id ) )
+        //Technically not needed, but does save calls to get_blog_details and get_user_meta
+        //in the event that the function is called when a user isn't logged in
+        if ( empty( $user_id ) ) {
+                return false;
+        }
+
+        if ( empty( $blog_id ) ) {
                 $blog_id = get_current_blog_id();
+        }
+
+        $blog = get_blog_details( $blog_id );
 
-        $blogs = get_blogs_of_user( $user_id );
-        return array_key_exists( $blog_id, $blogs );
+        if ( ! $blog || ! isset( $blog->domain ) || $blog->archived || $blog->spam || $blog->deleted ) {
+                return false;
+        }
+
+        $keys = get_user_meta( $user_id );
+        if ( empty( $keys ) ) {
+                return false;
+        }
+
+        //no underscore before capabilities in $base_capabilities_key
+        $base_capabilities_key = $wpdb->base_prefix . 'capabilities';
+        $site_capabilities_key = $wpdb->base_prefix . $blog_id . '_capabilities';
+
+        if ( isset( $keys[ $base_capabilities_key ] ) && defined( 'MULTISITE' ) && $blog_id == 1 ) {
+                return true;
+        }
+
+        if ( isset( $keys[ $site_capabilities_key ] ) ) {
+                return true;
+        }
+
+        return false;
 }
 
 /**