Many of the registered users wish to signup social networks like our previous articles login with Facebook and login with google. Twitter is one of the most used social networking website on the internet, So this is time I will explain how to make a Login System with Twitter using Php. Place a button on your site or application which allows Twitter users to enjoy the benefits of a registered user account in as little as one click.
Features:
Ease of use – A new visitor to your site only has to click two buttons in order to sign in for the first time.
Twitter integration – The Sign in with Twitter flow can grant authorization to use Twitter APIs on your users behalf.
OAuth based – A wealth of client libraries and example code are compatible with Sign in with Twitter’s API.
Please refer my previous articles
Login System with Google using Php and OAuth Api
Login System with Facebook using Php
Get Consumer key(API KEY) and Consumer Secret (API SECRET).
Step 1 – Go to the Url https://apps.twitter.com/
Login with you twitter credentials and access the twitter apps. Create new app
Step 2 – Create new application with your application name and details. Important thing is please give correct “call back url” which is used in you coding.
Step 3 – Get the Consumer key(API KEY) and Consumer Secret (API SECRET) here 
Now go to coding
Configuration – Create database and table
CREATE TABLE IF NOT EXISTS `twitter_users` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(255) NOT NULL, `twit_id` varchar(50) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;
Create config.php file for configuration with database.. Enter Your Consumer key(API KEY) and Consumer Secret (API SECRET) and call back url.
<?php
error_reporting(E_ALL & ~E_DEPRECATED & ~E_NOTICE);
ob_start();
session_start();
define('PROJECT_NAME', 'Login System with twitter using PHP - www.Developerdesks.com');
define('DB_DRIVER', 'mysql');
define('DB_SERVER', 'localhost');
define('DB_SERVER_USERNAME', 'root');
define('DB_SERVER_PASSWORD', '');
define('DB_DATABASE', 'your database');
$dboptions = array(
PDO::ATTR_PERSISTENT => FALSE,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
);
try {
$DB = new PDO(DB_DRIVER . ':host=' . DB_SERVER . ';dbname=' . DB_DATABASE, DB_SERVER_USERNAME, DB_SERVER_PASSWORD, $dboptions);
} catch (Exception $ex) {
echo $ex->getMessage();
die;
}
define("CLIENT_ID", "your client id"); // place your key here
define("SECRET_KEY", " your secret key");
/*
Make sure the url end with a trailing slash, give your site URL
your Site URL
*/
define("SITE_URL", "http://demos.developerdesks.com/login-with-twitter/");
/* the page where you will be redirected for authorization (call back url)*/
define("REDIRECT_URL", SITE_URL."twitter_login.php");
define("LOGOUT_URL", SITE_URL."logout.php");
?>
Create Call back url file twitter_login.php
When the user is signed in to twitter.com but has not granted access, a list of requested permissions, along with Sign In and Cancel buttons are shown. When the user is not signed in to twitter.com input fields for a username and password will be shown. Note that even if the user has already granted access to the application, the list of permissions will still be shown. The call back url function check the process integration with your database and twitter database give the access.
<?php
require('http.php');
require('oauth_client.php');
require('config.php');
//require('config.php');
$client = new oauth_client_class;
$client->debug = 1;
$client->debug_http = 1;
$client->redirect_uri = REDIRECT_URL;
//$client->redirect_uri = 'oob';
$client->client_id = CLIENT_ID;
$application_line = __LINE__;
$client->client_secret = SECRET_KEY;
if (strlen($client->client_id) == 0 || strlen($client->client_secret) == 0)
die('Please go to Twitter Apps page https://dev.twitter.com/apps/new , ' .
'create an application, and in the line ' . $application_line .
' set the client_id to Consumer key and client_secret with Consumer secret. ' .
'The Callback URL must be ' . $client->redirect_uri . ' If you want to post to ' .
'the user timeline, make sure the application you create has write permissions');
if (($success = $client->Initialize())) {
if (($success = $client->Process())) {
if (strlen($client->access_token)) {
$success = $client->CallAPI(
'https://api.twitter.com/1.1/account/verify_credentials.json', 'GET', array(), array('FailOnAccessError' => true), $user);
}
}
$success = $client->Finalize($success);
}
if ($client->exit)
exit;
if ($success) {
// Now check if user exist with same email ID
$sql = "SELECT COUNT(*) AS count from twitter_users where twit_id = :id";
try {
$stmt = $DB->prepare($sql);
$stmt->bindValue(":id", $user->id);
$stmt->execute();
$result = $stmt->fetchAll();
if ($result[0]["count"] > 0) {
// User Exist
$_SESSION["name"] = $user->name;
$_SESSION["id"] = $user->id;
$_SESSION["new_user"] = "no";
} else {
// New user, Insert in database
$sql = "INSERT INTO `twitter_users` (`name`, `twit_id`) VALUES " . "( :name, :id)";
$stmt = $DB->prepare($sql);
$stmt->bindValue(":name", $user->name);
$stmt->bindValue(":id", $user->id);
$stmt->execute();
$result = $stmt->rowCount();
if ($result > 0) {
$_SESSION["name"] = $user->name;
$_SESSION["id"] = $user->id;
$_SESSION["new_user"] = "yes";
$_SESSION["e_msg"] = "";
}
}
} catch (Exception $ex) {
$_SESSION["e_msg"] = $ex->getMessage();
}
$_SESSION["user_id"] = $user->id;
} else {
$_SESSION["e_msg"] = $client->error;
}
header("location:home.php");
exit;
?>
Finally create link for login in index.php
<a href="<?php echo $loginURL; ?>">
Login with twitter
</a>
Create home page as home.php after registering.
<?php if ($_SESSION["new_user"] == "yes") { ?>
<h2>welcome to developer desks.com </h2>
<h2>Thank you for registering with us!!!</h2>
<?php } else { ?>
<h2>Welcome back <?php echo $_SESSION["name"] ?>!!!</h2>
<?php } ?>
<h5>Your Login email is: <?php echo $_SESSION["email"]; ?></h5>
Logout.php
<?php if ($_SESSION["new_user"] == "yes") { ?>
<h2>welcome to developer desks.com </h2>
<h2>Thank you for registering with us!!!</h2>
<?php } else { ?>
<h2>Welcome back <?php echo $_SESSION["name"] ?>!!!</h2>
<?php } ?>
<h5>Your Login email is: <?php echo $_SESSION["email"]; ?></h5>
That’s it enjoy the code. Please subscribe me if you like my work.