Simple Captcha

Klub ships a lightweight captcha using php-simple-captcha and a dedicated endpoint. Use this page if you want a simple built-in challenge without third-party services.

Configuration

<?php

return [
  'bnomei.klub.captcha.set' => function () {
    $builder = new \SimpleCaptcha\Builder;
    $builder->bgColor = '#FFFFFF';
    $builder->lineColor = '#FFFFFF';
    $builder->textColor = '#000000';
    $builder->applyEffects = false;
    $builder->build();
    kirby()->session()->set('captcha', $builder->phrase);

    return ['captcha' => $builder->inline()];
  },
];

Render and validate

1. Fetch the captcha image from GET /klub/captcha.
2. Post the user input as captcha with your form.
3. klub()->captcha() compares the response with the stored phrase.

Keep CSRF checks enabled even when using captcha.