GoogleReCaptcha

ReCAPTCHA is a free CAPTCHA service that protect websites from spam and abuse. This library aims to providate an alternative to the official ReCAPTCHA library for verifying a users "No CAPTCHA reCAPTCHA" response. Internally it uses Guzzle for communicating with the ReCAPTCHA API.

Installation

The recommended way to install GoogleReCaptcha is through Composer.

# Install Composer
curl -sS https://getcomposer.org/installer | php

Next, run the Composer command to install the latest stable version of GoogleReCaptcha:

composer require "nietonfir/google-recaptcha"

Or add GoogleReCaptcha in your composer.json

"require": {
    "nietonfir/google-recaptcha": "~0.0"
}

and tell Composer to install the library:

composer update "nietonfir/google-recaptcha"

After installing, you need to require Composer's autoloader:

require 'vendor/autoload.php';

Usage

A sample validation client could look like the following:

use GuzzleHttp\Client;
use Nietonfir\Google\ReCaptcha\ReCaptcha;
use Nietonfir\Google\ReCaptcha\Api\RequestData,
    Nietonfir\Google\ReCaptcha\Api\ResponseFactory;

$requestData = new RequestData(
    'YOUR_API_SECRET_HERE',         // secret
    $_POST['g-recaptcha-response'], // user response
    $_SERVER['REMOTE_ADDR']         // end user IP
);

$reCaptcha = new ReCaptcha(new Client(), new ResponseFactory());
$response = $reCaptcha->processRequest($requestData);

if ($response->isValid()) {
    // check the hostname if "Domain Name Validation" is turned off
    // if($_SERVER['SERVER_NAME'] === $response->getHostName()) { … }
    echo 'I\'m not a robot';
} else {
    var_dump($response->getErrors());
}