reCAPTCHA plugin for php codeigniter

I’m playing around with codeigniter frameworks these days. One of my client requested to put reCAPTCHA into CI frameworks. So, I have tried to convert from original reCAPTCHA php plug-in to codeigniter library. So, I would like to share this library. I hope it useful for someone.

To use this library, you just need to follow by under following instruction :

Firstly, you have to move Recaptcha.php file into CI file structure system/application/libraries/
Use following code to load that library -

$this->load->library('recaptcha');

Then you have to set keys. Sometime you just need to set only one public key. So, just set public key only.
To set the keys

// Get a key from https://www.google.com/recaptcha/admin/create
$this->recaptcha->set_key ('XXXXXXXXXX Key XXXXXXXXX' ,'public') // For public key
$this->recaptcha->set_key ('XXXXXXXXXX Key XXXXXXXXX' ,'private') // For private key

To Show reCAPTCHA image and from. You just simply need to call recaptcha_get_html () function. In that function you can define theme and language of reCAPTCHA (Customization).
The function builded like -

recaptcha_get_html ( $error = null, $use_ssl = false, $options = array ('theme' => 'red', 'lang' => 'en') )

You just simply need to call like -

//Options for themes and language
$options = array ('theme' => 'clean', 'lang' => 'fr') ;
echo $this->recaptcha->recaptcha_get_html ( '', false, $options )

To check the answer from client

$resp = $this->recaptcha->recaptcha_check_answer ( $this->input->ip_address(), $this->input->post('recaptcha_challenge_field',true), $this->input->post('recaptcha_response_field',true));

if ($resp->is_valid) {
                echo "You got it!";
} else {
                # set the error code so that we can display it
                $error = $resp->error;
}

For mail hide functions

To use mail hide function, set mail hide api keys -

// Get a key from https://www.google.com/recaptcha/admin/create
$this->recaptcha->set_key ('XXXXXXXXXX Key XXXXXXXXX' ,'public') // For public key
$this->recaptcha->set_key ('XXXXXXXXXX Key XXXXXXXXX' ,'private') // For private key

The Mailhide version of example@example.com is

echo $this->recaptcha->recaptcha_mailhide_html ("example@example.com");

The url for the email is:

echo $this->recaptcha->recaptcha_mailhide_url ("example@example.com");

Download reCAPTCHA Codeigniter Library ( size 4 kB)

Hope it’s useful. Enjoy !!!