Captive Portal Voucher Already Expires

[Blackhat]

Good Day,

I was thinking about how to set an error page that say's voucher code already in-use when others attempt to use or share the voucher code.

Can anyone share your idea on how to code this?

[Gertjan]

As you said :
You should "code" this yourself.

IF
you know how PfSense 'works"
AND
you can fnd /etc/inc/captiveportal.inc
AND
you can read/write PHP
THEN
you are close to a solution ;)
ELSE
No.