Document how to add a CAPTCHA programmatically

Hi,

I'm building a standalone login page, with a custom-themeable LoginForm. I'm following instructions at,

"Theming the Drupal 6 User Login Form"
http://blog.aphexcreations.net/2009/04/theming-drupal-user-login-form.html

I've created an override "user-login.tpl.php"

	<?php $login_form = get_user_login_form(); ?>
	<?php print $login_form->form_start; ?>
	Username: <?php print $login_form->name; ?><br />
	Password: <?php print $login_form->pass; ?><br />
	<?php print $login_form->submit; ?>
	<?php print $login_form->form_end; ?>

as well as a standalone LoginPage (page-login.tpl.php), in which I output content, as usual, with

					<?php print $content; ?>

Which nicely outputs a functional login form -- but WITHOUT the display of my Drupal6 CAPTCHA module's reCaptcha element. The module's installed OK, and functions fine -- if/when display in the NOT-overriden, standard Login form.

What I'd like to do is include the reCaptcha element in MY form.

To do that, as a first step, I added the snippet from above to my theme's template.php as referenced in the link/tutorial above, i.e.,

      function get_user_login_form() {
      ...
      $form['#build_id'] = sprintf('form-%s', md5(uniqid(mt_rand(), TRUE)));
 +   $form['my_captcha_element'] = array(
 +     '#type' => 'captcha',
 +     '#captcha_type' => 'captcha/Math',
 +   )
      $form_state = array();
      ...

But, that's apparently not correct/sufficient -- I simply see my original/custom form, with no added (re)Captcha "Math" challenge visible, and nothing Captcha-related in the generated PageSource.

What's the right method to get the Captcha element added to "my" customizable form?

Thanks!

BenDJ

got it figured out.

in addition to

	$form['my_captcha_element'] = array(
		'#type' => 'captcha',
		'#captcha_type' => 'recaptcha/reCAPTCHA',
	);

the function in template.php needs

	$out->my_captcha_element = drupal_render($form['my_captcha_element']);

and then, the user-login.tpl.php needs,

	<?php print $login_form->my_captcha_element; ?>

AFter cache clear, the recaptcha element displays as expected.

i spoke a little too soon ...

the code above _displays_ the (re)captcha on my custom login page just fine.

but, the (re)captcha is _not_ part of the login validation flow -- username/password, with NOT (re)captcha entry/submit -- is sufficient to login. i.e., the (re)captcha's displayed, but ignored.

i can, i suppose, manually code an 'is_valid' check on the captcha response, but how would/should that be done still using the (re)captcha module's hooks?

i'm taking a different approach -- using a custom module, and working with #redirect.

so, for now, n/a.

thanks then.

sry, my mistake. thought it was one of my threads, and i don't know of any other way to stop following an issue ...

I want to add the CAPTCHA to a Profile form. There's no "markup" component like in Webform, so where would I put the PHP from the initial description above?

to #12

Thanks so much for taking the time to answer me! Yes, I now have the CAPTCHA on my Profile form.

Any way we could change the reCAPTCHA theme before/after loading 'my_captcha_element'?

<?php
$form['my_captcha_element'] = array(
  '#type' => 'captcha',
  '#captcha_type' => 'captcha/Math',
);
?>

I added this to my custom registration form. It seems to work. Thanks for the code.

I have an exposed filter on a view that needs a captcha, but it appears I can't enable it from the Captcha settings. I actually have two exposed filters, and they both appear in drupalforfirebug as form>views_exposed_form.

Adding the form in hook_form_alter using

$form['contact_wrapper']['info_captcha_element'] = array(
'#type' => 'captcha',
'#weight' => 35,
);

places the captcha form where I want it, but the page loads initially displaying :

* Math question field is required.
* The answer you entered for the CAPTCHA was not correct.

And when I submit I get: The answer you entered for the CAPTCHA was not correct.

Anyone know what is up with this? The form is in an expanded fieldset.

Thanks, new issue is #1064158: Captcha added to views exposed filter form gets automatically submitted, resulting in captcha error

What about image_captcha
It's probably trivial, but I can't figure it out.

update: I found it.

$form['captcha'] = array(
  '#type' => 'captcha',
  '#captcha_type' => 'image_captcha/Image',
);

If you need add an image captcha for a specific content type like webform, you can use the following code

<?php
  //Add captcha to all webforms
  if (strstr($form_id, 'webform_client_form')) {
        $form['my_captcha_element'] = array(
            '#type' => 'captcha',
            '#captcha_type' => 'image_captcha/Image',
        );
    }
?>

#21 works great. I'd add that it should go into a custom module using hook_form_alter:

function mymodule_form_alter(&$form, &$form_state, $form_id) {
  //Add captcha to all webforms
  if (strstr($form_id, 'webform_client_form')) {
        $form['my_captcha_element'] = array(
            '#type' => 'captcha',
            '#captcha_type' => 'image_captcha/Image',
        );
    }
}

In Drupal 7 and the theme I am working with:

in template.php ---> added:

function mythemename_preprocess_user_login(&$variables) {
  $variables['form'] = $variables[''];
+  $form['captcha'] = array(
+  '#type' => 'captcha',
+  '#captcha_type' => 'image_captcha/Image',
);
}

and in user-login.tpl.php:

<?php
+     print drupal_render($form['captcha']);
?>

This worked fine for the user login page, but for some reason captcha was still not displaying on the user registration page where most of the spam comes from - despite the fact that it had no custom template or modifications and should have worked through admin config options on the captcha module (user_register_form). I added a hook form alter function in template.php to correct that.

final code in template.php:

<?php

function mythemename_theme() {
  return array(
	'user_login' => array(
		'template' => 'user-login',
		'arguments' => array('form' => NULL),
    ),
	'user_register_form' => array(
		'arguments' => array('form' => NULL),
    ),
  );
}
//
function mythemename_preprocess_user_login(&$variables) {
  $variables['form'] = $variables[''];
  $form['captcha'] = array(
  '#type' => 'captcha',
  '#captcha_type' => 'image_captcha/Image',
);
}
function mythemename_preprocess_user_register_form(&$variables) {
  $variables['form'] = $variables[''];
  $form['captcha'] = array(
  '#type' => 'captcha',
  '#captcha_type' => 'image_captcha/Image',
);
}
function mythemename_form_alter(&$form, &$form_state, $form_id) {
  if (strstr($form_id, 'user_register_form')) {
        $form['catcha'] = array(
            '#type' => 'captcha',
            '#captcha_type' => 'image_captcha/Image',
        );
    }
}

Final code in user-login.tpl.php:

<?php
     print drupal_render($form['name']);
     print drupal_render($form['pass']);
     print drupal_render($form['links']);
     print drupal_render($form['captcha']);
     print drupal_render($form['form_build_id']);
     print drupal_render($form['form_id']); 
     print drupal_render($form['actions']);
?>

For Hidden Captcha:

 $form['my_captcha_element'] = array(
    '#type' => 'captcha',
    '#captcha_type' => 'hidden_captcha/Hidden CAPTCHA',
  );

For Draggable Captcha:

<?php
 $form['my_captcha_element'] = array(
      '#type' => 'captcha',
      '#captcha_type' => 'draggable_captcha/Draggable Captcha',
    );
?>

how can i find the value(i.e 3+4=) the user has to enter ?

// Set captcha image for specific webform form.
module_load_include('inc', 'captcha');
$form_id = 'webform_client_form_' . $my_form_id();
$captcha_type = 'image_captcha/Image';
captcha_set_form_id_setting($form_id, $captcha_type);

Adding a CAPTCHA programmatically nowadays it's just about exporting the config entity properly, marking this as fixed.