A very simple referral cushion/jumper written in PHP.
License: CC0: do whatever you want with this.
Released without warranty.
To configure: Follow the comments on index.php
URL Path: /index.php?url=[target URL]
for example, https://example.com/index.php?url=https://google.com
or https://example.com/?url=http://yotuba.com
used here: