Flexi Custom Code - Awesome PHP Code Insertion Module

Today I will introduce a free module for adding PHP, HTML, CSS or JS code.
Unfortunately the developer of this module has stopped working, but it still works on Joomla 4 - Simply because this module is not complicated.
I have used many Custom modules, but this is the only one that supports PHP language. Make you comfortable to customize the website (Of course if you know PHP - LOL).
This module is now out of JED, fortunately I have a backup. You can download it below:
Flexi Custom Code - Joomla 3 & 4 Flexi Custom Code - Joomla 2.5
I will have a series of articles related to PHP and will use this module.
But still this old and ugly black player.
I ve bought the pro version, i have 5700 k2 items, and only approximately 4000 migrate successfully. When i try to rerun the migration to see if it migrates the remaining 1700, it re-migrates the already migrated, creating dublicates with differnt seo url.