Why sololearn community is not updating lessons on PHP

Question

PDO, connecting to database, XML and Ajax, are not created in PHP, why

Answer 1

My additional suggestions:
namespaces, traits, generators, PSR recommendations, autoloading, APIs.

You can mail [e-mail] to tell them

Answer 2

For the mean time you can devour these resources

https://www.php.net/manual/en/
https://phptherightway.com
https://phpdelusions.net/