Reddit is a link aggregator. It doesn’t actually have instructions on it.
It does however have comments and self posts. Laracasts is quite popular in /r/webdev and mentioned frequently when someone comes asking for help. The community is very helpful on quite a few subs, with /r/learnprogramming, /r/webdev, /r/web_design, and then the various misc language subs. /r/php however is, and always has been, a cesspool.