From b2041758f4479f4a600dcdf8ebf3c89189978ddb Mon Sep 17 00:00:00 2001
From: kagla <kagla@naver.com>
Date: Thu, 16 Sep 2021 06:07:41 +0000
Subject: [PATCH] =?UTF-8?q?PHP8=EC=97=90=EC=84=9C=20=EB=82=98=EC=98=A4?=
 =?UTF-8?q?=EB=8A=94=20Undefined=20array=20key=20"HTTP=5FUSER=5FAGENT"=20?=
 =?UTF-8?q?=EC=98=A4=EB=A5=98=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lib/common.lib.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/common.lib.php b/lib/common.lib.php
index 18562a637..b6bb9837c 100644
--- a/lib/common.lib.php
+++ b/lib/common.lib.php
@@ -2219,7 +2219,10 @@ function get_checked($field, $value)
 
 function is_mobile()
 {
-    return preg_match('/'.G5_MOBILE_AGENT.'/i', $_SERVER['HTTP_USER_AGENT']);
+    if (isset($_SERVER['HTTP_USER_AGENT']))
+        return  preg_match('/'.G5_MOBILE_AGENT.'/i', $_SERVER['HTTP_USER_AGENT']);
+    else
+        return '';
 }