MyBB plugin to show username in header welcome block in user group style

welcomeback_groupstyle.php

<?php

// Disallow direct access to this file for security reasons
if(!defined("IN_MYBB"))
{
    die("Direct initialization of this file is not allowed.");
}

$plugins->add_hook("global_intermediate", "welcomeback_groupstyle_run");

function welcomeback_groupstyle_info()
{
    return array(
        "name"          => "Welcomeback User Name in Group Style",
        "description"   => "",
        "website"       => "https://gist.github.com/SvePu/7a280d52bbd29546ccef",
        "author"        => "SvePu",
        "authorsite"    => "https://github.com/SvePu",
        "version"       => "1.0",
        "guid"          => "",
        "codename"      => "welcomeback",
        "compatibility" => "*"
    );
}

function welcomeback_groupstyle_run()
{
	global $lang, $mybb, $lastvisit;
	if($mybb->user['uid'] != 0)
	{
		$lang->welcome_back = $lang->sprintf($lang->welcome_back, build_profile_link(format_name($mybb->user['username'], $mybb->user['usergroup'], $mybb->user['displaygroup']), $mybb->user['uid']), $lastvisit);
	}	
}