Sort tabs based on values using php

I have 3 variables holding 3 different values(managed from admin).

$tab_download_pos = 2;
$tab_download_title = "Download";
$tab_overview_pos = 1;
$tab_overview_title = "Overview";
$tab_faq_pos = 3;
$tab_faq_title = "FAQ";

Now I have 3 tabs and I would like to sort the tabs based on the values from above variables.

The three tabs are

1.Overview
2.Download
3.Faq

I started in this way

$tab_arr = sort(array($tab_download_pos,$tab_overview_pos,$tab_faq_pos));

I did foreach loop but then I am lost. I would like to sort the tabs based on the values from the variables which I am getting from backend.

Any help is highly appreciated. Thanks in advance.