PDO Connections to MySQL from PHP

Thank you so much!

your channel is awesome ...

great

Thank you. I really appreciate your clear concise explanations and the variety of topics. Just one question. Do you need a minimal version of PHP in order to use PDO?

what would the DNS be if the file here was on a external webserver: $db = new PDO('mysql: host=what????; is it the domain name of the website associated with this?

when would one use mysqli or any other connection method? and why would one be preferred over the other?

I didn't know you did PHP as well--I've been refocusing here, good news