Sample Authetication to extend portal;
Please Update your EAP220: http://www.tp-link.com/en/download/EAP220.html EAP Controller_V2.4.4,EAP220(EU)_V1_160401.
Install the wampserver windows: https://sourceforge.net/projects/wampserver/
If you any question, please send email to alexandre at ktudu dot com.
Good Luck !