[Performance] Mybb Php 8.0

[JimR]

These files are not designed to be run from the command line, MyBB expects to be run via a web server so REQUEST_METHOD would normally be set. What's the rationale for running on the command line?

well it allowed me to correct the isset issue in class_core.php without running from the command line I would have had no clue where to start looking as the browser is just returning the apache default error page

#1 /var/www/html/mybb27/install/index.php(28): MyBB->__construct()

took me to the point that the $mybb object was failing which in turn took me to class_core.php with the error

#0 /var/www/html/mybb27/inc/class_core.php(264): errorHandler->error()

 
where I found the issue. adding the adjustments in the previous post I was able to install mybb using php 8.08 as the web browser no longer gave a 500 error and processed as expected

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admin cp does not find correct lang string  to fix change 
this block at around line 1930 in admin/modules/config/settings.php

 while($group = $db->fetch_array($query))
                {
                        $group_lang_var = "setting_group_{$group['name']}";
                        if($lang->$group_lang_var)
                        {
                                $group_title = htmlspecialchars_uni($lang->$group_lang_var);
                        }
                        else
                        {
                                $group_title = htmlspecialchars_uni($group['title']);
                        }

                        $group_desc_lang_var = "setting_group_{$group['name']}_desc";
                        if($lang->$group_desc_lang_var)
                        {
                                $group_desc = htmlspecialchars_uni($lang->$group_desc_lang_var);
                        }
                        else
                        {
                                $group_desc = htmlspecialchars_uni($group['description']);
                        }

                        $table->construct_cell("<strong><a href=\"index.php?module=config-settings&amp;action=change&amp;gid={$group['gid']}\">{$group_title}</a></strong> ({$group['settingcount']} {$lang->bbsetti>
                        $table->construct_row();
                }

to 

 while($group = $db->fetch_array($query))
                {
                        $group_lang_var = "setting_group_{$group['name']}";
                        if(isset($lang->$group_lang_var))
                        {
                                $group_title = htmlspecialchars_uni($lang->$group_lang_var);
                        }
                        else
                        {
                                $group_title = htmlspecialchars_uni($group['title']);
                        }

                        $group_desc_lang_var = "setting_group_{$group['name']}_desc";
                        if(isset($lang->$group_desc_lang_var))
                        {
                                $group_desc = htmlspecialchars_uni($lang->$group_desc_lang_var);
                        }
                        else
                        {
                                $group_desc = htmlspecialchars_uni($group['description']);
                        }

                        $table->construct_cell("<strong><a href=\"index.php?module=config-settings&amp;action=change&amp;gid={$group['gid']}\">{$group_title}</a></strong> ({$group['settingcount']} {$lang->bbsetti>
                        $table->construct_row();
                }