From 1ccbc605871a6d2e35908e7dc84985d488535556 Mon Sep 17 00:00:00 2001
From: Hadi Nategh <hnategh@gmail.com>
Date: Tue, 16 Nov 2021 11:23:03 +0100
Subject: [PATCH] Fix PHP8.0 (TypeError): key(): Argument #1 ($array) must be
 of type array, null given

---
 mail/inc/class.mail_acl.inc.php | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mail/inc/class.mail_acl.inc.php b/mail/inc/class.mail_acl.inc.php
index c858d47245..af35e1d28e 100644
--- a/mail/inc/class.mail_acl.inc.php
+++ b/mail/inc/class.mail_acl.inc.php
@@ -205,11 +205,7 @@ class mail_acl
 		}
 		else
 		{
-			$button = @key($content['button']);
-			if (!empty ($content['grid']['delete']))
-			{
-				$button = 'delete';
-			}
+			$button = !empty ($content['grid']['delete']) ? 'delete' : @key((array)$content['button']);
 			$data = $content;
 			$data['mailbox'] = self::_extract_mailbox($content['mailbox'], $acc_id);
 			switch ($button)