zendservice-recaptcha

1. composer.json

{
    "name": "zendframework/skeleton-application",
    "description": "Skeleton Application for ZF2",
    "license": "BSD-3-Clause",
    "keywords": [
        "framework",
        "zf2"
    ],
    "homepage": "http://framework.zend.com/",
    "require": {
        "php": ">=5.3.3",
        "zendframework/zendframework": "2.3.*",
        "zendframework/zendservice-recaptcha":"dev-master"
    },
}

2. composer update run

php composer.phar update

3. local.php

<?php

return array(
    'recaptcha' => array(
        'pubKey' => 'YOURRECAPTCHAPUBLICKEY',
        'privKey' => 'YOURRECAPTCHAPRIVATEKEY',
    ),
);

4. global.php

<?php

return array(
    'service_manager' => array(
        'factories' => array(
            'reCaptchaService' => function(Zend\ServiceManager\ServiceManager $sm) {
                   $config = $sm->get('Config');
                   $recaptcha = $config['recaptcha'];

                   return new ZendService\ReCaptcha\ReCaptcha($recaptcha['pubKey'], $recaptcha['privKey']);
             },
        ),
    ),
);

5. Controller action

public function indexAction()
{
    $recaptcha = $this->getServiceLocator()->get('reCaptchaService');
    echo $recaptcha->getHTML();
}