PHP Captcha::invalid_count方法代码示例

 public function page1()
 {
     $view = new View('signup/page1');
     // Load Captcha library, you can supply the name of the config group you would like to use.
     $captcha = new Captcha();
     // Form info
     $form = array('username' => '', 'password' => '', 'password_confirm' => '', 'email' => '');
     //  copy the form as errors, so the errors will be stored with keys corresponding to the form field names
     $errors = $form;
     // Ban bots (that accept session cookies) after 50 invalid responses.
     // Be careful not to ban real people though! Set the threshold high enough.
     if ($captcha->invalid_count() > 49) {
         exit('Bye! Stupid bot.');
     }
     // Form submitted
     if ($_POST) {
         // Add some rules, the input field, followed by a list of checks, carried out in order
         $valid_c = Captcha::valid($this->input->post('captcha_response'));
         $this->user = ORM::factory('user');
         $post = $this->input->post();
         if ($this->user->validate($post) && $valid_c) {
             $this->user->save();
             $this->session->set('uid', $this->user->id);
             $this->user->add(ORM::factory('role', 'login'));
             $this->auth->login($this->user, $post['password']);
             url::redirect('/signup/page2');
             exit(0);
         } else {
             // repopulate the form fields
             $form = arr::overwrite($form, $post->as_array());
             $errors = arr::overwrite($errors, $post->errors('signup_errors'));
             if (!$valid_c) {
                 $errors['captcha_response'] = "Invalid";
             }
         }
     }
     // Put the vars in the template
     $view->set("errors", $errors);
     $this->template->content = $view;
     $this->template->content->captcha = $captcha;
     $this->template->content->form = $form;
 }

 /**
  * Demontrates how to use the Captcha library.
  */
 public function captcha()
 {
     // Look at the counters for valid and invalid
     // responses in the Session Profiler.
     new Profiler();
     // Load Captcha library, you can supply the name
     // of the config group you would like to use.
     $captcha = new Captcha();
     // Ban bots (that accept session cookies) after 50 invalid responses.
     // Be careful not to ban real people though! Set the threshold high enough.
     if ($captcha->invalid_count() > 49) {
         exit('Bye! Stupid bot.');
     }
     // Form submitted
     if ($_POST) {
         // Captcha::valid() is a static method that can be used as a Validation rule also.
         if (Captcha::valid($this->input->post('captcha_response'))) {
             echo '<p style="color:green">Good answer!</p>';
         } else {
             echo '<p style="color:red">Wrong answer!</p>';
         }
         // Validate other fields here
     }
     // Show form
     echo form::open();
     echo '<p>Other form fields here...</p>';
     // Don't show Captcha anymore after the user has given enough valid
     // responses. The "enough" count is set in the captcha config.
     if (!$captcha->promoted()) {
         echo '<p>';
         echo $captcha->render();
         // Shows the Captcha challenge (image/riddle/etc)
         echo '</p>';
         echo form::input('captcha_response');
     } else {
         echo '<p>You have been promoted to human.</p>';
     }
     // Close form
     echo form::submit(array('value' => 'Check'));
     echo form::close();
 }