Ticket #48554: 48554.2.diff

wp-includes/ms-functions.php

@@ -1424 +1424 @@
          * @since MU (3.0.0)
          *
          * @param string $msg Email body.
+         * @param int $blog_id The new site's object or ID.
          */
-        $msg = apply_filters( 'newblog_notify_siteadmin', $msg );
+        $msg = apply_filters( 'newblog_notify_siteadmin', $msg, $blog_id );
 
         /* translators: New site notification email subject. %s: New site URL. */
         wp_mail( $email, sprintf( __( 'New Site Registration: %s' ), $siteurl ), $msg );