Codeigniter-recaptcha

This library makes it easy to use Google's reCAPTCHA V2

Contents

• Installation
  • Via composer
  • Manually
• Documentation
  • Getting the keys
  • Setting the keys
  • Loading the library
  • Setting parameters
  • Creating the reCAPTCHA box
  • Validating the reCAPTCHA
• Example
• Contributing

Installation

Via composer

If you have composer installed you can run

composer require mehdibo/codeigniter-recaptcha

Copy the content of config/recaptcha.php to application/config/recaptcha.php

First time using composer

Open a terminal (commands in windows), the commands here are for linux but you can find the equivalent in windows.

1. First thing you should do is install composer

2. Go to your application folder: cd application

3. Install the library: composer require mehdibo/codeigniter-recaptcha

4. Copy the content of config/recaptcha.php to your application/config/recaptcha.php

5. Go to application/config/config.php and set composer_autoload to TRUE

6. That's it! check the Documentation for more details.

Manually

1. Download the latest release.

2. Copy libraries/Recaptcha.php to application/libraries and config/recaptcha.php to application/config.

3. Load the library using the Codeigniter loader $this->load->library('recaptcha'), check the example.

4. See the documentation for usage.

Documentation

Getting the keys

To use the reCAPTCHA you need a pair of keys (A secret and site keys), these can be obtained from Google by going to: https://www.google.com/recaptcha/admin

And registering a new website, make sure you tick the "reCAPTCHA V2" option.

Setting the keys

There are three ways to pass the keys to the library

In the config file

You can set the keys by editing the config/recaptcha.php config file

Using the CodeIgniter loader

By passing an array of configs to the CodeIgniter loader, more details in the "Loading the library" section.

Using the set_keys method

You can pass the keys to the set_keys methods (after loading the library) like this:

$this->recaptcha->set_keys('site_key', 'secret_key');

Loading the library

You can load the library like any other library:

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

Or if installed via composer:

$recaptcha = new Recaptcha($config);

And you can access the methods like this:

$recaptcha->method_name();

The $config argument is optional, It can have an array of configs to the library.

$config options are:

• $config['site_key'] - Site key provided by Google
• $config['secret_key'] - Secret key provided by Google
• $config['parameters'] - An associative array of parameters and their value, 'parameter-name' => 'value', more details about parameters in the "Setting parameters" section.

Setting parameters

You can set the parameters (g-recaptcha tag attributes and grecaptcha.render parameters) by using the set_parameter or set_parameters methods.

To set a parameter you can do it by calling:

$this->recaptcha->set_parameter('parameter_name', 'value');

Or by passing an array to set_parameters:

$this->recaptcha->set_parameters($params);

Where $params is an associative array of param_name => value.

When passing a parameter, omit the data- part, for example, If you want to set the data-theme parameter to dark you will do it like this:

$this->recaptcha->set_parameter('theme', 'dark');

Creating the reCAPTCHA box

To create the reCAPTCHA box's HTML code call the create_box method:

$this->recaptcha->create_box($attributes)

This method takes one optional parameter, an array of custom attributes, for example:

$attributes = array(
    'class' => 're-box',
    'id' => 'an-id'
)

Notice: You need to have the reCAPTCHA JS code included in your code:

<script src='https://www.google.com/recaptcha/api.js'></script>

Validating the reCAPTCHA

The is_valid method can be called to verify that the user passed the reCAPTCHA's puzzle.

$this->recaptcha->is_valid($response, $ip)

this method takes two optional parameters:

$response - the response submitted by the user, set to NULL so that it'll be taken automatically from the POST data

$ip - the user IP to be sent to Google's server

Set to FALSE to not send the IP

Set to NULL to get the user's IP automatically

And it returns an array:

'success' => TRUE if the recaptcha was passed,

'error' => TRUE if there was an error connecting to the server,

'error_message' => If error is true, this contains the message returned by curl,

'challenge_ts' =>  timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)

'hostname' => the hostname of the site where the reCAPTCHA was solved

'error-codes' => error codes returned by Google if there are any

Example

Here is a quick example to use the Codeigniter-recaptcha library.

Installed via composer

The Controller

<?php

class Form extends CI_Controller {

	public function index()
	{
		/*
		 Load the reCAPTCHA library.
		 You can pass the keys here by passing an array to the class.
		 Check the "Setting the keys" section for more details
		*/
		$recaptcha = new Recaptcha();

		/*
		 Create the reCAPTCHA box.
		 You can pass an array of attributes to this method.
		 Check the "Creating the reCAPTCHA box" section for more details
		*/
		$box = $recaptcha->create_box();

		// Check if the form is submitted
		if($this->input->post('action') === 'submit')
		{
			/*
			 Check if the reCAPTCHA was solved
			 You can pass arguments to the `is_valid` method,
			 but it should work fine without any.
			 Check the "Validating the reCAPTCHA" section for more details
			*/
			$is_valid =$recaptcha->is_valid();

			if($is_valid['success'])
			{
				echo "reCAPTCHA solved";
			}
			else
			{
				echo "reCAPTCHA not solved/an error occured";
			}
		}

		$this->load->view('form', ['recaptcha' => $box]);
	}

Installed manually

The Controller

<?php

class Form extends CI_Controller {

	public function index()
	{
		/*
		 Load the reCAPTCHA library.
		 You can pass the keys here by passing an array to the loader.
		 Check the "Setting the keys" section for more details
		*/
		$this->load->library('recaptcha');

		/*
		 Create the reCAPTCHA box.
		 You can pass an array of attributes to this method.
		 Check the "Creating the reCAPTCHA box" section for more details
		*/
		$recaptcha = $this->recaptcha->create_box();

		// Check if the form is submitted
		if($this->input->post('action') === 'submit')
		{
			/*
			 Check if the reCAPTCHA was solved
			 You can pass arguments to the `is_valid` method,
			 but it should work fine without any.
			 Check the "Validating the reCAPTCHA" section for more details
			*/
			$is_valid = $this->recaptcha->is_valid();

			if($is_valid['success'])
			{
				echo "reCAPTCHA solved";
			}
			else
			{
				echo "reCAPTCHA not solved/an error occured";
			}
		}

		$this->load->view('form', ['recaptcha' => $recaptcha]);
	}

The view

<!DOCTYPE html>
<html>
<head>
	<title>CodeIgniter reCAPTCHA</title>
	<!-- reCAPTCHA JavaScript API -->
	<script src='https://www.google.com/recaptcha/api.js'></script>
</head>

<body>
	<form action="/path/to/controller">
		<?=$recaptcha?>
		<button type="submit" name="action" value="submit">Submit</button>
	</form>
</body>

</html>

Contributing

All contributions are welcome! Just make sure you read How to contribute