First of all, thank you for opening the lecture. I used PHP 5 a lot, but when I moved to PHP 7, I wanted to learn the new grammar and functions, so I watched the PHP Reboot lecture. What I felt while watching the lecture is that I recommend that people who are somewhat proficient watch the lecture rather than beginners. This is because the lecture quickly goes over the general explanation and there is no explanation of tips or know-how. I also always used to do things I used to do, so I sometimes get lost when I encounter new grammar. I wish the lecture had explained this part and taught it in parallel. And I think it would be much more helpful if you included these insufficient parts in the textbook.