CODEWITHSUNDEEP
phpmysqlmysqli
medve.cfg
medve.cfg

Reputation: 89

How can I make Users submit only one vote?

I have to make a Website where users can vote only once. I tried to register them in my db using their IP address with $_SERVER['REMOTE_ADDR'] but i did some research and found out that in some cases multiple users can have the same IP (using the same wifi or the IPS sharing IP's between them). Also, i don't want them to make an account to be able to vote, or log in with facebook, google, etc...

Is there any way to do this with PHP?

Upvotes: 1

Views: 80

Answers (2)

qqmydarling
qqmydarling

Reputation: 177

You can store to DB a fingerprint and then compare it like you did before with an IP address
https://github.com/Valve/fingerprintjs
or u can make your own fingerprint by storing user's device, it width,height,timezone,etc

But it'll fail if someone will vote with other device.
I think it must works like an Antifraud systems, but they're based on the same way I wrote.

Upvotes: 1

Sunil
Sunil

Reputation: 11243

Just have a quick glance at https://github.com/samyk/evercookie. Your search will end there.

Upvotes: 1

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