hCaptcha for vBulletin 4
brought to you by playersquared.com
This mod serves as a new Human Verification method using the hCaptcha solution.
Should work on all versions of vBulletin 4, all the way to 4.2.5.
Works on both PHP 5 and 7, up to (at least) 7.3.
This mod was heavily based on...