“PHP Fatal error:  Uncaught Error: Call to undefined function mb_strtolower()”

Make sure your PHP install has the required modules, probably “php-7.3-mbstring” in this case.

Adam.

From: observium <observium-bounces@observium.org> On Behalf Of Stempien, Dave via observium
Sent: 03 January 2022 16:14
To: Observium <observium@observium.org>
Cc: Stempien, Dave <David.Stempien@UR.Rochester.edu>
Subject: Re: [Observium] [EXT] Re: PHP error on update

Getting similar after upgrading to 11834 (CentOS 7.9/PHP 7.3.33):

[Mon Jan 03 11:06:45.135451 2022] [php7:error] [pid 57609] [client 128.151.7.150:57712] PHP Fatal error:  Uncaught Error: Call to undefined function mb_strtolower() in /opt/observium/libs/Phpfastcache8/Core/Pool/IO/IOHelperTrait.php:123\nStack trace:\n#0 /opt/observium/libs/Phpfastcache8/Drivers/Sqlite/Driver.php(76): Phpfastcache\\Drivers\\Sqlite\\Driver->getPath()\n#1 /opt/observium/libs/Phpfastcache8/Drivers/Sqlite/Driver.php(67): Phpfastcache\\Drivers\\Sqlite\\Driver->getSqliteDir()\n#2 /opt/observium/libs/Phpfastcache8/Core/Pool/DriverBaseTrait.php(75): Phpfastcache\\Drivers\\Sqlite\\Driver->driverCheck()\n#3 /opt/observium/libs/Phpfastcache8/CacheManager.php(189): Phpfastcache\\Drivers\\Sqlite\\Driver->__construct(Object(Phpfastcache\\Drivers\\Sqlite\\Config), '08f80c5221b918a...')\n#4 /opt/observium/includes/cache.inc.php(569): Phpfastcache\\CacheManager::getInstance('Sqlite')\n#5 /opt/observium/html/includes/functions.inc.php(18): include_once('/opt/observium/...')\n#6 /opt/observium/html/ajax/widget.php(17): include('/opt/observium/...')\n#7 {main}\n  thrown in /opt/observium/libs/Phpfastcache8/Core/Pool/IO/IOHelperTrait.php on line 123, referer: http://observium.net.rochester.edu/dashboard/

HTTP Error 500 trying to access dashboard.

From: observium <observium-bounces@observium.org> on behalf of Joey Stanford via observium <observium@observium.org>
Date: Thursday, December 30, 2021 at 2:05 PM
To: Observium <observium@observium.org>
Cc: Joey Stanford <nv0n@rmham.org>
Subject: [EXT] Re: [Observium] PHP error on update

Debian 10 Buster with php-fpm installed.

PHP 7.3.31-1~deb10u1

> On Dec 30, 2021, at 09:14 , Joey Stanford <nv0n@rmham.org> wrote:
>
> Sorry more context: updated to revision 11834 and this happens when running /opt/observium/discovery.php -u
>
>> On Dec 30, 2021, at 08:38 , Joey Stanford via observium <observium@observium.org> wrote:
>>
>>
>>
>> PHP Fatal error:  Uncaught Error: Call to undefined function mb_strtolower() in /opt/observium/libs/Phpfastcache8/Core/Pool/IO/IOHelperTrait.php:123
>> Stack trace:
>> #0 /opt/observium/libs/Phpfastcache8/Drivers/Files/Driver.php(60): Phpfastcache\Drivers\Files\Driver->getPath()
>> #1 /opt/observium/libs/Phpfastcache8/Core/Pool/DriverBaseTrait.php(75): Phpfastcache\Drivers\Files\Driver->driverCheck()
>> #2 /opt/observium/libs/Phpfastcache8/Drivers/Files/Driver.php(52): Phpfastcache\Drivers\Files\Driver->__parentConstruct(Object(Phpfastcache\Drivers\Files\Config), '967045f41b52c87...')
>> #3 /opt/observium/libs/Phpfastcache8/CacheManager.php(189): Phpfastcache\Drivers\Files\Driver->__construct(Object(Phpfastcache\Drivers\Files\Config), '967045f41b52c87...')
>> #4 /opt/observium/includes/cache.inc.php(603): Phpfastcache\CacheManager::getInstance('Files')
>> #5 /opt/observium/includes/sql-config.inc.php(310): include_once('/opt/observium/...')
>> #6 /opt/observium/discovery.php(19): include('/opt/observium/...')
>> #7 {main}
>> thrown in /opt/observium/libs/Phpfastcache8/Core/Pool/IO/IOHelperTrait.php on line 123
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