php Fat Free, how to use captcha plugin

I can't use the Captcha plugin provid开发者_如何学运维ed by Fat Free

Please help me

F3::route ( 'GET /captcha',captcha);

function captcha(){
    F3::captcha(100,100,8);
}

It should be:

F3::route ( 'GET /captcha','captcha');

Fix so easy! http://techzinger.blogspot.com/2011/02/fat-free-framework-for.html?showComment=1298024374012#c4330544534362949394

Let F3 know where your fonts folder is

I have following in my index.php file

define('ROOT',realpath(__dir__.'/../').'/');

F3::set('FONTS',ROOT.'fonts/');