From 2c2ee90d587c548ea48fe0a426e8d4ef823ca216 Mon Sep 17 00:00:00 2001
From: 3D-I <480857+3D-I@users.noreply.github.com>
Date: Tue, 29 Dec 2020 22:04:31 +0100
Subject: [PATCH] [ticket/16641] Fix config.php validation in ACP - PHP 8

PHPBB3-16641
---
 phpBB/includes/acp/acp_main.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index eddd48bf2a..bd50ea2046 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -681,7 +681,9 @@ class acp_main
 
 		if (!defined('PHPBB_DISABLE_CONFIG_CHECK'))
 		{
-			$template->assign_var('S_WRITABLE_CONFIG', (bool) $phpbb_filesystem->is_writable($phpbb_root_path . 'config.' . $phpEx));
+			$template->assign_var('S_WRITABLE_CONFIG',
+				(bool) $phpbb_filesystem->is_writable($phpbb_root_path . 'config.' . $phpEx) || (@fileperms($phpbb_root_path . 'config.' . $phpEx) & 0x0002)
+			);
 		}
 
 		$this->php_ini			= $phpbb_container->get('php_ini');