I am using Joomla 2.5.16 and K2 2.55. Where the captcha is supposed to show up it says enter the two words that you see below, but no words show up. I have searched many posts to find a solution, but nothing has worked so far. I have tried using local jquery instead of remote, 1.71. I have tried changing the link to google as some as suggested in the captcha.php. Nothing has worked so far.

When I go to the global config settings and I click on the drop down I see two recaptcha options, one that just says recaptcha and the other says Captcha- recaptcha. Everytime I try to make the Captcha-recaptcha as the one that I use it always just goes to the one that only says recaptcha. Not sure if this could be my problem. I searched my plugins and I only see the Captcha-recaptcha plugin and nothing for the other one listed.
Any help would be appreciated thanks

There seems to be a bug in Joomla's plugin for re-captcha in Joomla 2.5.16.
Make the following changes to

plugins/captcha/recaptcha/recaptcha.php

Replace this: (line 24)

const RECAPTCHA_API_SERVER = "api.recaptcha.net";

with this:

const RECAPTCHA_API_SERVER = "www.google.com/recaptcha/api";

This (line 26): const RECAPTCHA_VERIFY_SERVER = "api-verify.recaptcha.net";
with this: const RECAPTCHA_VERIFY_SERVER = "www.google.com";

and this (line 118): $response = $this->_recaptcha_http_post(self::RECAPTCHA_VERIFY_SERVER, "/verify",

with this: $response = $this->_recaptcha_http_post(self::RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/verify",


Let me know if it worked.

I'm using Joomla 2.5.6 & K2 2.5.7
It won't work using your method.

If upgrade K2 to 2.6.5 (without modify the recaptcha.php file), it shows the two words correctly, but can't get reCaptcha to work with registering a new account.

@smching

The versions of Joomla! and K2 you are using are outdated. You need to:
1. Update Joomla! to 2.5.24
2. Update K2 to 2.6.8.

In any case remember to backup your site first.