From 7fdc5f9e485f224ebc50353a1817b66a6db6587f Mon Sep 17 00:00:00 2001
From: leon <leon@roojs.com>
Date: Fri, 27 Oct 2023 15:17:57 +0800
Subject: [PATCH] TimeZone.php

---
 TimeZone.php | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/TimeZone.php b/TimeZone.php
index ff141ca9..a7c59274 100644
--- a/TimeZone.php
+++ b/TimeZone.php
@@ -123,30 +123,42 @@ class Pman_Core_TimeZone extends Pman
     static function toRegion($tz)
     {
         if(!self::isValidTimeZone($tz)) {
-            return false;
+            return '';
         }
         return explode('/', $tz)[0];
     }
 
     static function toArea($tz)
     {
+        if(!self::isValidTimeZone($tz)) {
+            return '';
+        }
         return explode('/', $tz)[1];
     }
     
     static function toTimeOffset($dt, $tz)
     {
+        if(!self::isValidTimeZone($tz)) {
+            return '';
+        }
         $date = new DateTime($dt, new DateTimeZone($tz));
         return $date->format('P');
     }
 
     static function toDisplayArea($dt, $tz)
     {
+        if(!self::isValidTimeZone($tz)) {
+            return '';
+        }
         return str_replace('_', ' ', self::toArea($tz)) . ' (GMT ' . self::toTimeOffset($dt,$tz) . ')';
 
     }
 
     static function toDisplayName($dt, $tz)
     {
+        if(!self::isValidTimeZone($tz)) {
+            return '';
+        }
         return self::toRegion($tz) . '/' . self::toDisplayArea($dt, $tz);
     }
 }
\ No newline at end of file
-- 
2.39.2