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LinkedIn API Cheat Sheet

<?php // Change these back to your things define('API_KEY', 'YOUR API KEY'); define('API_SECRET', 'YOUR API SECRET'); define('REDIRECT_URI', 'http://localhost/'); // I've changed the scope to work for what we generally have access to define('SCOPE', 'r_basicprofile r_emailaddress'); // This stuff I believe it used if you have a database session_name('linkedin'); session_start(); // OAuth 2 Control Flow if (isset($_GET['error'])) { // LinkedIn returned an error print $_GET['error'] . ': ' . $_GET['error_description']; exit; } elseif (isset($_GET['code'])) { // User authorized your application if ($_SESSION['state'] == $_GET['state']) { // Get token so you can make API calls getAccessToken(); } else { // CSRF attack? Or did you mix up your states? exit; } } else { if ((empty($_SESSION['expires_at'])) || (time() > $_SESSION['expires_at'])) { // Token has expired, clear the state $_SESSION = array(); } if (empty($_SESSION['access_token'])) { // Start authorization process getAuthorizationCode(); } } // You have a valid token. Now fetch your profile. // I've just put in some dummy fields for now, but hopefully these should do it. $user = fetch('GET', '/v1/people/~:(first-name,last-name,email-address,phone-numbers,num-connections,picture-url,location,positions,summary,specialties,industry)'); // I've just shoved the responses into some variables from the $user dict response // STORE THE RESULTS IN AN ARRAY $res = array(); $res[] = $user->firstName; $res[] = $user->lastName; $res[] = $user->emailAddress; $res[] = $user->phoneNumbers; $res[] = $user->numConnections; $res[] = $user->pictureUrl; $res[] = $user->location->country->code; $res[] = $user->location->name; $res[] = $user->summary; $res[] = $user->specialties; $res[] = $user->industry; $res[] = $user->positions; echo nl2br("First name: ". $res[0] . "\n"); echo nl2br("Last name: ". $res[1] . "\n"); echo nl2br("Email Address: " . $res[2] . "\n"); echo nl2br("Phone Numbers: ". $res[3] . "\n"); echo nl2br("Num Connections: ". $res[4] . "\n"); echo nl2br("Picture Url: " . $res[5] . "\n"); echo nl2br("Location Country Code: " . $res[6]. "\n"); echo nl2br("Location Name: ". $res[7] . "\n"); echo nl2br("Summary: " . $res[8] . "\n"); echo nl2br("Specialties: ". $res[9] . "\n"); echo nl2br("Industry: ". $res[10] . "\n"); echo nl2br("Positions: " . $res[11] . "\n"); exit; function getAuthorizationCode() { $params = array('response_type' => 'code', 'client_id' => API_KEY, 'scope' => SCOPE, 'state' => uniqid('', true), // unique long string 'redirect_uri' => REDIRECT_URI, ); // Authentication request $url = 'https://www.linkedin.com/uas/oauth2/authorization?' . http_build_query($params); // Needed to identify request when it returns to us $_SESSION['state'] = $params['state']; // Redirect user to authenticate header("Location: $url"); exit; } function getAccessToken() { $params = array('grant_type' => 'authorization_code', 'client_id' => API_KEY, 'client_secret' => API_SECRET, 'code' => $_GET['code'], 'redirect_uri' => REDIRECT_URI, ); // Access Token request $url = 'https://www.linkedin.com/uas/oauth2/accessToken?' . http_build_query($params); // Tell streams to make a POST request $context = stream_context_create( array('http' => array('method' => 'POST', ) ) ); // Retrieve access token information $response = file_get_contents($url, false, $context); // Native PHP object, please $token = json_decode($response); // Store access token and expiration time $_SESSION['access_token'] = $token->access_token; // guard this! $_SESSION['expires_in'] = $token->expires_in; // relative time (in seconds) $_SESSION['expires_at'] = time() + $_SESSION['expires_in']; // absolute time return true; } // this fetch should be the main thing that you really need to add to what you already have! function fetch($method, $resource, $body = '') { $params = array('oauth2_access_token' => $_SESSION['access_token'], 'format' => 'json', ); // Need to use HTTPS $url = 'https://api.linkedin.com' . $resource . '?' . http_build_query($params); // Tell streams to make a (GET, POST, PUT, or DELETE) request $context = stream_context_create( array('http' => array('method' => $method, ) ) ); // Hocus Pocus $response = file_get_contents($url, false, $context); // Native PHP object, please return json_decode($response); } ?>

Repository

https://github.com/okeeffed/developer-notes-nextjs/content/linkedin/linkedin-api-cheat-sheet

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