From a24c82ba39b1282b47b5a94859cc727573fadf66 Mon Sep 17 00:00:00 2001
From: ralf <rb@egroupware.org>
Date: Thu, 4 Apr 2024 14:23:48 +0200
Subject: [PATCH] fixing the fix: must NOT prepend backup dir for $name===null

---
 api/src/Db/Backup.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/api/src/Db/Backup.php b/api/src/Db/Backup.php
index 158780792b..3c8760cf84 100644
--- a/api/src/Db/Backup.php
+++ b/api/src/Db/Backup.php
@@ -195,7 +195,7 @@ class Backup
 	 */
 	public function fopen_backup(string $name=null, bool $reading=false, bool $un_compress=true)
 	{
-		if ($name[0] !== '/')
+		if ($name && $name[0] !== '/')
 		{
 			$name = $this->backup_dir.'/'.basename($name);
 		}