Simple PHP library for working with the LinkedIn API (based on epiTwitter by Jaisen Mathai [email protected] -- see http://wiki.github.com/jmathai/epicode/epitwitter ).

require_once('EpiCurl.php'); require_once('EpiOAuth.php'); require_once('EpiLinkedIn.php');

$linkedin_consumer_key = "CONSUMER KEY ASSIGNED BY LINKEDIN"; $linkedin_consumer_secret = "CONSUMER SECRET ASSIGNED BY LINKEDIN";

// The following code is used to generate the proper authorization link try { // authorize with LinkedIn $linkedinObj = new EpiLinkedIn($linkedin_consumer_key, $linkedin_consumer_secret); // set the location you want LinkedIn to send the user/response // when they authorize your app. $linkedinObj->setCallback("http://" . $_SERVER['SERVER_NAME'] . "/linkedin.php"); // LinkedIn returns an array of data (oauth_token_secret AND oauth_token) $values = $linkedinObj->getAuthenticateUrl(); // Save the secret that is generated/returned by LinkedIn (we'll // need this when we deal with the response [via our callback]) $_SESSION['oauth_token_secret'] = $values['oauth_token_secret']; ?> "> Authorize our app with LinkedIn <? } catch (Exception $e) { // troubles authorizing; check your consumer key and secret combo }

// use this code to handle the response from a user authorizing your app. on LinkedIn try { // Get a token from LinkedIn $linkedinObj = new EpiLinkedIn($linkedin_consumer_key, $linkedin_consumer_secret); // we need to use a combination of the oauth_token sent by LinkedIn // and the previous secret LinkedIn sent us when we generated the authorize link (above code) $linkedinObj->setToken($_GET['oauth_token'],$_SESSION['oauth_token_secret']); // finally we get tokens we can use to make actual API requests by using the // oauth_verifier sent by LinkedIn $token = $linkedinObj->getAccessToken(array('oauth_verifier' => $_REQUEST['oauth_verifier'])); // we now have user $token->oauth_token and $token->oauth_token_secret // save them somewhere for use with future API calls for this user $_SESSION['linkedin_token_key'] = $token->oauth_token; $_SESSION['linkedin_token_secret'] = $token->oauth_token_secret; } catch (Exception $e) { // troubles getting a token; check your token and secret }

// The following code shows an example API call once we have proper tokens try { // now we should be able to make our LinkedIn API calls $lObj = new EpiLinkedIn($linkedin_consumer_key, $linkedin_consumer_secret, $_SESSION['linkedin_token_key'], $_SESSION['linkedin_token_secret']); // let's get the details from the LinkedIn profile $profile = $lObj->get('/v1/people/~:(first-name,last-name,location,industry,summary)'); // LinkedIn returns XML, so let's conver to a PHP object $xml = simplexml_load_string($profile->responseText, 'SimpleXMLElement', LIBXML_NOCDATA); // For demo purposes let's just roll the data up into an associative array $user['firstname'] = (string) $xml->{'first-name'}; $user['lastname'] = (string) $xml->{'last-name'}; $user['location'] = (string) $xml->location->name; $user['industry'] = (string) $xml->industry; $user['summary'] = (string) $xml->summary; // and finally display what we've got var_dump($user); } catch (Exception $e) { // troubles making a call; check your call syntax }