Modern Defense Against CSRF Attacks Posted by resonantcore on Saturday February 28, 2015 @12:13AM from the resonantcore.net dept. https://resonantcore.net/blog/2015/02/modern-defense-against-csrf-attacks ( 1 comment | 5 points | on HN )
It's free software released under the Affero GNU Public License. Feel free to use it in other FLOSS projects written in PHP.