[PHP-Base] lessons from (https://www.youtube.com/watch?v=a6xtQQqx1tg) [PHP-Part 2] lessons from (https://www.youtube.com/watch?v=vJRL_MKoX9M) [PHP 2023. Основы синтаксиса, переменные, базовые операции PHP] lesson from (https://www.youtube.com/watch?v=NsSfJno2u-w&t=6s)