math_captcha.module in CAPTCHA Pack 8

Contains general functionality of the module.

File

math_captcha/math_captcha.module

<?php

/**
 * @file
 * Contains general functionality of the module.
 */

/**
 * Implements hook_help().
 */
function math_captcha_help($path, $arg) {
  switch ($path) {
    case 'admin/config/people/captcha/math_captcha':
      return '<p>' . t("Provide math CAPTCHAs like 'two + three = ?' and '2 times ? = 6'.") . '</p>';
  }
}

/**
 * Implements hook_captcha().
 */
function math_captcha_captcha($op, $captcha_type = '') {
  switch ($op) {
    case 'list':
      return [
        'Math CAPTCHA',
      ];
    case 'generate':
      if ($captcha_type == 'Math CAPTCHA') {
        module_load_include('inc', 'math_captcha', 'math_captcha.challenge');

        // Get the available challenges.
        $enabled_challenges = _math_captcha_enabled_challenges();
        $challenges = array_filter($enabled_challenges);
        $challenge = $challenges[array_rand($challenges)];
        $form_item = call_user_func("_math_captcha_{$challenge}_challenge");
        \Drupal::service('page_cache_kill_switch')
          ->trigger();
        return $form_item;
      }
      break;
  }
}

/**
 * Get enabled math captcha challenges.
 */
function _math_captcha_enabled_challenges() {
  return Drupal::config('math_captcha.settings')
    ->get('math_captcha_enabled_challenges');
}

Functions

Name	Description
math_captcha_captcha	Implements hook_captcha().
math_captcha_help	Implements hook_help().
_math_captcha_enabled_challenges	Get enabled math captcha challenges.