I can't find some feature in new version

about 1 year ago i install piwik
after 1year i download latest version of piwik and install it in another server
but now i can’t find some features:
1- in old version there was a method to tracking visitor with php script and PiwikTracker.php file, i can’t this feature in new version settings section.
2- i remember in old version, there was a method to record Mouse movements and actions visually, but in new version i can’t find it!
please help me

Tracking API: Tracking API - Analytics Platform - Matomo