how to 1.) Goto https://www.reddit.com/prefs/apps
2.) both about and redirect url link to https://yourdomain/../oauth.php
3.) either use oAuth oauth.php?clientid=###&clientsecret=### or configure config.php
=> will yield OauthAccess Token
4.) use with poster.php
Reddit Comment Poster

Reddit Comment Poster (OAuth token from query, localStorage, or manual)

tools

OAuth token autofills from ?oauth= or localStorage 'redditoauth'. Minimum comment length: 10 characters.