Jan 23, 2008
How to implement reCAPTCHA
If you haven’t been spammed by bots, yet, you probably will soon be 
.
On jobber.ro, we use reCAPTCHA to prevent spam. It’s a hosted captcha provider and much more!
Step 1. Create an account with reCAPTCHA
Go ahead and create an account, download the PHP API (and copy recaptchalib.php in the _includes/ directory, and sign up for an API key.
Step 2. Add reCAPTCHA when posting an ad
config.php
Define 2 constants, one for public and one for the private API key:
define('CAPTCHA_PUBLIC_KEY', '12345_YOUR_PUBLIC_KEY');
define('CAPTCHA_PRIVATE_KEY', '12345_YOUR_PRIVATE_KEY');Also add the following line (find the other require_once lines), which includes the recaptcha library:
require_once '_includes/recaptchalib.php';_templates/publish-write.tpl
Right above the submit button’s fieldset, insert the following code:
<h2 class="publish_section">Anti-spam</h2>
<fieldset>
{literal}
<script type="text/javascript">
var RecaptchaOptions = {
theme : 'white',
tabindex : 9
};
</script>
{/literal}
{$the_captcha} <span class="validation-error">{if $errors.captcha}
<img src="{$BASE_URL}img/icon-delete.png" alt="" />{/if}</span>
</fieldset>page-write.php
On line 2, we generate the html code that displays the captcha in the template:
$smarty->assign('the_captcha', recaptcha_get_html(CAPTCHA_PUBLIC_KEY));Next, we perform a simple validation when posting the ad. Find the following line:
if ($_POST['action'] && $_POST['action'] == 'publish')A couple of lines below it, after you initialize the $errors array, add this code:
$resp = recaptcha_check_answer(CAPTCHA_PRIVATE_KEY,
$_SERVER["REMOTE_ADDR"], $_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]);
if (!$resp->is_valid)
{
$errors['captcha'] = 'Incorrect code';
}Then, we need to add the captcha validation in another section of page-write.php, the one that handles the ad edit. Find the following line and add the same code as above:
else if ($_POST['action'] && $_POST['action'] == 'edit'That should be it 
.
Enjoy!
and add
require_once ‘_includes/recaptchalib.php’; in config.php
Of course, thanks!
how do we customize the look and feel of reCaptcha? By the way, today is my first time to jobber and i would like to see the requirement of this job application. Where can I find it
Some info, here: http://recaptcha.net/apidocs/captcha/client.html
You can also change it via CSS.
I followed all the steps but in:
Code:
page-write.php
On line 2, we generate the html code that displays the captcha in the template:
$smarty->assign(‘the_captcha’, recaptcha_get_html(CAPTCHA_PUBLIC_KEY));
———————–
I do not know where to place this line.
Anyone helpe me…
Thanks
Hi guys,
Followed all the instructions here but I get the following error message. Help is appeciated. Thanks
Notice: Undefined index: action in /home/.kookie/page_write.php on line 3
Notice: Undefined variable: resp in /home/.kookie/page_write.php on line 9
Notice: Trying to get property of non-object in /home/.kookie/page_write.php on line 9
Notice: Undefined index: action in /home/.kookie/page_write.php on line 123
Notice: Undefined variable: resp in /home/.kookie/page_write.php on line 129
Notice: Trying to get property of non-object in /home/.kookie/page_write.php on line 129
Notice: Undefined variable: company in /home/.kookie/page_write.php on line 142
Notice: Undefined variable: title in /home/.kookie/page_write.php on line 146
Notice: Undefined variable: description in /home/.kookie/page_write.php on line 150
Notice: Undefined variable: poster_email in /home/.kookie/page_write.php on line 154
hi filip do you know how to add the captcha for the apply field because I have spam on it too… Thanks for your help.
henri
you should sort out the apply for jobs section and implement the antispam thing asap man!!! this is getting too much messed up..
nirav
I did all things described, but I don’t see a captha…
A small change to fit better with the rest:
———-
Delete:
Anti-spam
———-
add after :
Anti-spam
Beautiful implementation and instructions, worked the first time!
Hello there,
Thanks for the post.
Is it very simple to implement the re-CAPTCHA for the APPLY Page as well?
Thanks for HELP.
Dear Filip,
Thanx for this great explanation. But I’ve got the same question as Marc-Oliver. What do I have to do to make it apply to the APPLY page. What are the crucial steps you have to follow?
FYI
http://www.jobberbase.com/forum/post2130.html#p2130
http://www.jobberbase.com/blog/01-23-2008/how-to-implement-recaptcha/comment-page-1/#comment-1004
If i add the line require_once ‘_includes/recaptchalib.php’; in config.php my first page shows totally blank!!!
any thoughts on this?