From 0c31234e0915b225fcca16776c5a649d746d080e Mon Sep 17 00:00:00 2001
From: Kijin Sung <kijin@kijinsung.com>
Date: Wed, 16 Feb 2022 13:15:31 +0900
Subject: [PATCH] Fix isset(), unset() and empty() not working in template
 syntax

---
 classes/template/TemplateHandler.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/classes/template/TemplateHandler.class.php b/classes/template/TemplateHandler.class.php
index df0698afb..8294bd6d2 100644
--- a/classes/template/TemplateHandler.class.php
+++ b/classes/template/TemplateHandler.class.php
@@ -635,7 +635,7 @@ class TemplateHandler
 		// {@ ... } or {$var} or {func(...)}
 		if($m[1])
 		{
-			if(preg_match('@^(\w+)\(@', $m[1], $mm) && !function_exists($mm[1]))
+			if(preg_match('@^(\w+)\(@', $m[1], $mm) && (!function_exists($mm[1]) && !in_array($mm[1], ['isset', 'unset', 'empty'])))
 			{
 				return $m[0];
 			}