Utilisation Linkedin API

J'ai trouvé tout seul alors je partage mon controller pour ceux qui auraient besoin de s'enregistrer avec l'API Linkedin :

App::import('Vendor', 'OAuth/OAuthClient');
class UsersController extends AppController {
    public $uses = array('LinkedinUser');

    private function createLinkedinClient() {
                return new OAuthClient('YOUR_API_KEY', 'YOUR_SECRET_API_KEY');
                exit;
        }

    public function linkedinRegister() {
        $method = empty($this->request->query'method']) ? null : $this->request->query'method'];
        $token = empty($this->request->query'oauth_token']) ? null : $this->request->query'oauth_token'];

        if ($method && $method == 'linkedin' && $token == 'empty') {
            $linkedinClient = $this->createLinkedinClient();
            $requestTokenUrl = 'https://api.linkedin.com/uas/oauth/requestToken';
            $callbackUrl = 'YOUR_CALLBACK_URL';
            $requestTokenResponse = $linkedinClient->getRequestToken($requestTokenUrl, $callbackUrl);

            if ($requestTokenResponse) {
                $requestToken = $requestTokenResponse;
                $this->Session->write('linkedin_request_token', $requestToken);
                $this->redirect('https://api.linkedin.com/uas/oauth/authorize?oauth_token=' . $requestToken->key);
            } else {
                throw new Exception(
                    __("Echec lors de la récupération du jeton : ") . $linkedinClient->getFullResponse()
                );
            }
        }
        exit;
    }

    public function linkedinRegisterCallback() {
        $requestToken = $this->Session->read('linkedin_request_token');
        $oAuthVerifier = empty($this->request->query'oauth_verifier']) ? null : $this->request->query'oauth_verifier'];
        $linkedinClient = $this->createLinkedinClient();
        $accessTokenUrl = 'https://api.linkedin.com/uas/oauth/accessToken';
        $accessToken = $linkedinClient->getAccessToken($accessTokenUrl, $requestToken);
        $url = "http://api.linkedin.com/v1/people/~/";

        if ($accessToken) {
            $pattern = "/.*>(.*)<.*/";
            $emailAddress = $linkedinClient->get($accessToken->key, $accessToken->secret, $url . 'email-address');
            preg_match($pattern, $emailAddress, $output);
            $emailAddress = $output[1];

            $firstName = $linkedinClient->get($accessToken->key, $accessToken->secret, $url . 'first-name');
            preg_match($pattern, $firstName, $output);
            $firstName = $output[1];

            $lastName = $linkedinClient->get($accessToken->key, $accessToken->secret, $url . 'last-name');
            preg_match($pattern, $lastName, $output);
            $lastName = $output[1];

            $headline = $linkedinClient->get($accessToken->key, $accessToken->secret, $url . 'headline');
            preg_match($pattern, $headline, $output);
            $headline = $output[1];

            $pictureUrl = $linkedinClient->get($accessToken->key, $accessToken->secret, $url . 'picture-url');
            $pattern = '/<picture-url>(.*)<\/picture-url>/';
            preg_match($pattern, $pictureUrl, $output);
            $picture = $output[1];

            $exist = $this->LinkedinUser->find('first', array(
                'condtions' => array(
                    'email' => $emailAddress
                )
            ));
            if (!$exist) {
                $linkedinUser = array(
                    'LinkedinUser' => array(
                        'email' => $emailAddress,
                        'first-name' => $firstName,
                        'last-name' => $lastName,
                        'headline' => $headline,
                        'picture-link' => $picture,
                        'created' => date('Y-m-d H:i:s')
                    )
                );
                if ($this->LinkedinUser->save($linkedinUser)) {
                    $this->redirect(array(
                        'controller' => 'home',
                        'action' => 'index',
                        '?' => array(
                            'linkedin-account' => 'not-exist'
                        ),
                        '#' => 'message'
                    ));
                }
            } else {
                $this->redirect(array(
                    'controller' => 'home',
                    'action' => 'index',
                    '?' => array(
                        'linkedin-account' => 'exist'
                    ),
                    '#' => 'message'
                ));
            }
        }
        exit;
    }
}