From 2bdda23a569036aea51cbfaf63d84004e7ab8f7f Mon Sep 17 00:00:00 2001
From: lukinovec <lukinovec@gmail.com>
Date: Fri, 1 May 2026 10:37:22 +0200
Subject: [PATCH] Disallow empty strings as filenames

---
 .../Concerns/ValidatesDatabaseParameters.php         | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/Database/Concerns/ValidatesDatabaseParameters.php b/src/Database/Concerns/ValidatesDatabaseParameters.php
index 1c50a97b..f9438b52 100644
--- a/src/Database/Concerns/ValidatesDatabaseParameters.php
+++ b/src/Database/Concerns/ValidatesDatabaseParameters.php
@@ -111,8 +111,16 @@ trait ValidatesDatabaseParameters
     {
         $this->validateParameter($filename, static::allowedFilenameCharacters());
 
-        if (is_string($filename) && is_dir($filename)) {
-            throw new InvalidArgumentException("Filename '{$filename}' is a directory.");
+        if (! is_string($filename)) {
+            throw new InvalidArgumentException("Filename has to be a string.");
+        }
+
+        if ($filename === '') {
+            throw new InvalidArgumentException("Filename cannot be empty.");
+        }
+
+        if (is_dir($filename)) {
+            throw new InvalidArgumentException("Filename ('{$filename}') cannot be a directory.");
         }
     }
 }