From: "Paul Smedley" <ecs-isp@2rosenthals.com>
Message-ID: <381f7d1e-df01-4889-ab69-ababaeb2256b@smedley.id.au>
Date: Fri, 26 Jan 2024 09:24:30 +1030
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Subject: Re: [eCS-ISP] RoundCube webmail 1.4 or 1.5 php issue
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Hi guys,

On 26/1/24 08:28, Lewis G Rosenthal wrote:
> On 01/25/24 08:44 am, Massimo S. wrote:
>> Hi all,
>>
>> i need to upgrade RC webmail from 1.3.17 LTS to 1.4.14 or better 1.5.6.
>>
>> Env:
>> Server Version: Apache/2.4.57 (OS/2) OpenSSL/1.1.1l PHP/7.4.32
>> Server Built: Apr 8 2023 07:51:12
>>
>> The php webmail fail at boot with this error:
>>
>> [25-Jan-2024 14:14:06 Europe/Rome] PHP Fatal error:  Uncaught Error: 
>> Call to undefined function mb_regex_encoding() in 
>> D:\apache\htdocs\webmail\program\lib\Roundcube\bootstrap.php:87
>> Stack trace:
>> #0 D:\apache\htdocs\webmail\program\include\iniset.php(74): 
>> require_once()
>> #1 D:\apache\htdocs\webmail\installer\index.php(43): 
>> require('D:\\apache\\htdo...')
>> #2 {main}
>>   thrown in 
>> D:\apache\htdocs\webmail\program\lib\Roundcube\bootstrap.php on line 87
>>
>
> Setting aside what php.ini says, what does phpinfo(); say about the 
> configuration and loaded modules?
>
> First, check that mbstring is indeed loaded. Then look back up at the 
> top of the page. Under my php 7.4.32 Configure Command (3rd category 
> down, in the top section), I see:
>
> --disable-mbregex
>
> which effectively disables mbstring's regex component. See:
>
> https://www.php.net/manual/en/migration74.other-changes.php
>
> My guess is that we do not (yet) have libonig available, necessary for 
> mbregex functions, which is why Paul built with mbregex disabled (just 
> a WAG; Paul, please correct me if I am looking in the wrong place).
>
> Perhaps there's a way to disable mbregex calls in RC, assuming you 
> don't really need them?
>
Per https://github.com/psmedley/php-os2/blob/main/configure.sh - 
--disable-mbregex is indeed set.

I have no re-collection as to what drove this to be set,  if there was a 
3rd party dependency that wasn't readily available, that was likely the 
issue.

Cheers,

Paul