Using ASP and want to calculate an MD5? Oh, you need to pay an add-on for that. Want to send an email? Ditto.
Then there was PHP, with all included (and cheaper hosting, because Linux). I started working on a web shop and after a month ASP was legacy and PHP the new cool thing, together with MySQL instead of using... Access as "database" in ASP.
It was the SQL part of the book that helped me build the SQL skillset that is an integral part of my day job.
Used a book similar to this one:
https://www.thriftbooks.com/w/professional-php4-programming_...
haha. My first ever project as an intern in 2004 was exactly this.
Doesn't all that make you long for the days of ./configure --prefix=/somewhere/sane && sudo install -d -o yourusername /somewhere/sane && make install? Just add empscripten to the tool chain and you can do web things with it, sort of...
If I did that I'd have missed a hell of a lot of cool stuff in life haha