Installation failed: Rspamd & Undefined variable: redhatrel in powerdns_plugin.inc.php

Hello today i ran ISPConfig 3 installer:
cd /tmp;wget http://www.ispconfig.org/downloads/ISPConfig-3-stable.tar.gz;tar xfz ISPConfig-3-stable.tar.gz;cd ispconfig3_install/install/;php -q install.php

on my CentOS 6.10 64bit

Some info messages in my case was:
"[INFO] service Rspamd not detected"
"[INFO] haveged not detected - DNSSEC can fail"

So i additionaly installed haveged (yum install haveged;chkconfig haveged on)
but can not find how to install rspamd?

And second thing, the install ended like this:

Installation ended with error in my case:

---

php -q htf-common-issues.php
PHP Notice: Undefined variable: redhatrel in /tmp/ispconfig3_install/install/htf-common-issues.php on line 179

 

So how do i proceed?

$ php -v
PHP 5.3.3 (cli)

$ yum remove php
---> Package php.x86_64 0:5.3.3-49.el6 will be erased
---> Package squirrelmail.noarch 0:1.4.22-5.el6 will be erased

I followed most recent tutorial for CentOS 6.x that you have suggested at https://www.ispconfig.org/documentation/
It was this one "The Perfect Server – CentOS 6.5 x86_64 (Apache2, Dovecot, ISPConfig 3)"

it contained instruction to install squirrelmail, so i did, maybe it installed that php version. So how to proceed being on CentOS 6.10 64bit?

I do not see you mention which PHP version is minimum and you should make your installator script to check the requirement before it start altering my system right? As i do not know now how do i proceed with:

- upgrading PHP and to which version minimum (yum upgrade php -> No Packages marked for Update;epel repo is available)
- installing again this crashed installation

Please kindly let me know what steps to do On my CentOS 6.10 64bit, i will not be using CentOS 7 atm.

 

It is old server with a few installed SW and backups. I do not want to reinstall it nor use ISPConfig for anything serious.
Possibly i can find some tutorial to upgrade to higher PHP (you have not mentioned which version is required. Possibly it is not known, so i can try 5.6 maybe).
PHP had problem processing line:
$pubkeys = [];
Do you know how to install ISPConfig again after mentioned installation crash?
php -q uninstall.php says

Maybe you should remove CentOS 6 Debian 7 etc. tutorials from https://www.ispconfig.org/documentation/
Thanks for your support

 

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Following apparently worked to make ISPConfig running on CentOS 6.10 64bit:

I installed Remi repo and it installed PHP 5.4.45 (cli):

upgraded php:

update script:

(Enter key on everything)
Then :8080 shows "The requested URL / was not found on this server."

It complained about Unable to remove the ispconfig-database-user ispconfig Column count of mysql.user is wrong.
Ran:

again uninstall:

(it complained about missing paths.)
then install:

And ispconfig seem to be working at https://IP:8080