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From: =?UTF-8?q?No=C3=A9=20Cendrier?=
 <81741011+altairis-noe@users.noreply.github.com>
Date: Tue, 21 May 2024 15:54:49 +0200
Subject: [PATCH] =?UTF-8?q?FIX:=20php=20warning=20if=20cookie=20doesn?=
 =?UTF-8?q?=E2=80=99t=20exist=20(#29723)?=
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---
 htdocs/core/class/html.formmargin.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htdocs/core/class/html.formmargin.class.php b/htdocs/core/class/html.formmargin.class.php
index 688f55aa0cb..9dc3f9b3780 100644
--- a/htdocs/core/class/html.formmargin.class.php
+++ b/htdocs/core/class/html.formmargin.class.php
@@ -227,7 +227,7 @@ class FormMargin
 		} elseif (empty($reshook)) {
 			if (getDolGlobalString('MARGIN_ADD_SHOWHIDE_BUTTON')) {
 				print $langs->trans('ShowMarginInfos') . ' ';
-				$hidemargininfos = preg_replace('/[^a-zA-Z0-9_\-]/', '', $_COOKIE['DOLUSER_MARGININFO_HIDE_SHOW']); // Clean cookie
+				$hidemargininfos = preg_replace('/[^a-zA-Z0-9_\-]/', '', $_COOKIE['DOLUSER_MARGININFO_HIDE_SHOW']) ?? ''; // Clean cookie
 				print '<span id="showMarginInfos" class="linkobject valignmiddle ' . (!empty($hidemargininfos) ? '' : 'hideobject') . '">' . img_picto($langs->trans("Disabled"), 'switch_off') . '</span>';
 				print '<span id="hideMarginInfos" class="linkobject valignmiddle ' . (!empty($hidemargininfos) ? 'hideobject' : '') . '">' . img_picto($langs->trans("Enabled"), 'switch_on') . '</span>';