Sun, 05 Apr 2026 20:15:26 +0000 https://bugs.horde.org/ticket/15191 ActiveSync: mb_substr croaks on windows native encoding See Re: [horde] Active Sync Error > 2025-05-16T09:09:29.867574+02:00 wm HORDE: #15 /var/www/html/wm/vendor/horde/horde/rpc.php(165): Horde_Rpc_ActiveSync->getResponse() > 2025-05-16T09:09:29.867787+02:00 wm HORDE: #16 {main} [pid 565 on line 76 of "/var/www/html/wm/vendor/horde/core/lib/Horde/ErrorHandler.php"] > 2025-05-16T09:09:34.657124+02:00 wm HORDE: [imp] Login success for andreas (10.0.25.8) (forwarded for [80.152.143.17]) to {imap://10.0.25.2/} [pid 564 on line 145 of "/var/www/html/wm/vendor/horde/imp/lib/Auth.php"] > 2025-05-16T09:09:34.733152+02:00 wm HORDE: ValueError: mb_substr(): Argument #4 ($encoding) must be a valid encoding, "windows-1258" given in /var/www/html/wm/vendor/horde/util/lib/Horde/String.php:329 HORDE: ValueError: mb_substr(): Argument #4 ($encoding) must be a valid encoding, "windows-1258" given in /var/www/html/wm/vendor/horde/util/lib/Horde/String.php:329 Fri, 16 May 2025 08:25:14 +0000 https://bugs.horde.org/ticket/15191#t94252 CP1258 aka Windows-1258 is not supported on PHP mb_ functions. We could revert to UTF-8 for unsupported code pages but the results will not be perfect. Wed, 21 May 2025 05:18:56 +0000 https://bugs.horde.org/ticket/15191#t94260 CP1258 aka Windows-1258 is not supported on PHP mb_ functions. We could revert to UTF-8 for unsupported code pages but the results will not be perfect. Wed, 21 May 2025 09:26:07 +0000 https://bugs.horde.org/ticket/15191#t94266