Add Twitter Login In Website

Twitter Login Script 

this post informed you guys that how the used twitter login in your website.

no matter how you know about this.

this is a simple script just embed this within your site and you got the result output that twiiter login works user friendly.

Let's Start the File Structure

We use Three Files For twitter Login

• index.php
• home.php
• twitteroauth.php
• OAuth.php
• twconfig.php
• login-twitter.php
• getTwitterData.php
• functions.php

Download the twitteroauth.php & OAuth.php File 

Let's Start the Coding Part

1. index.php

<?php
//Always place this code at the top of the Page
session_start();
if (isset($_SESSION['id'])) {
    // Redirection to login page twitter or facebook
    header("location: home.php");
}

if (array_key_exists("login", $_GET)) {
    $oauth_provider = $_GET['oauth_provider'];
    if ($oauth_provider == 'twitter') {
        header("Location: login-twitter.php");
    } 
}
?>
<title>onlinewebapplication.com Facebook | Twitter Login</title>
<style type="text/css">
    #buttons
{
text-align:center
}
    #buttons img,
    #buttons a img
    { border: none;}
h1
{
font-family:Arial, Helvetica, sans-serif;
color:#999999;
}

</style>



<div id="buttons">
<h1>Twitter Facebook Login </h1>
    <a href="?login&oauth_provider=twitter"><img src="images/tw_login.png"></a>  
</div>

2. home.php

<?php

//Always place this code at the top of the Page
session_start();
if (!isset($_SESSION['id'])) {
    // Redirection to login page twitter or facebook
    header("location: index.php");
}

echo '<h1>Welcome</h1>';
echo 'id : ' . $_SESSION['id'];
echo '<br/>Name : ' . $_SESSION['username'];
echo '<br/>Email : ' . $_SESSION['email'];
echo '<br/>You are login with : ' . $_SESSION['oauth_provider'];
echo '<br/>Logout from <a href="logout.php?logout">' . $_SESSION['oauth_provider'] . '</a>';
?>

3. twconfig.php

<?php

define('YOUR_CONSUMER_KEY', 'Your Twitter App key');

define('YOUR_CONSUMER_SECRET', 'Your Twitter App Security key');

?>

4. login-twitter.php

<?php
require("twitteroauth.php");
require 'twconfig.php';
session_start();

$twitteroauth = new TwitterOAuth(YOUR_CONSUMER_KEY, YOUR_CONSUMER_SECRET);
// Requesting authentication tokens, the parameter is the URL we will be redirected to
$request_token = $twitteroauth->getRequestToken('http://mydomain.com/getTwitterData.php');

// Saving them into the session

$_SESSION['oauth_token'] = $request_token['oauth_token'];
$_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret'];

// If everything goes well..
if ($twitteroauth->http_code == 200) {
    // Let's generate the URL and redirect
    $url = $twitteroauth->getAuthorizeURL($request_token['oauth_token']);
   header('Location: ' . $url);
    // header('Location: http://mydomain.com/home.php');
} else {
    // It's a bad idea to kill the script, but we've got to know when there's an error.
    die('Something wrong happened.');
}
?>

5. getTwitterData.php

<?php
ob_start();
require("twitteroauth.php");
require 'twconfig.php';
require 'functions.php';
session_start();

if (!empty($_GET['oauth_verifier']) && !empty($_SESSION['oauth_token']) && !empty($_SESSION['oauth_token_secret'])) {
    // We've got everything we need
    $twitteroauth = new TwitterOAuth(YOUR_CONSUMER_KEY, YOUR_CONSUMER_SECRET, $_SESSION['oauth_token'], $_SESSION['oauth_token_secret']);
// Let's request the access token
    $access_token = $twitteroauth->getAccessToken($_GET['oauth_verifier']);
// Save it in a session var
    $_SESSION['access_token'] = $access_token;
// Let's get the user's info
    $user_info = $twitteroauth->get('account/verify_credentials');
// Print user's info
    echo '<pre>';
    print_r($user_info);
    echo '</pre><br/>';
    if (isset($user_info->error)) {
        // Something's wrong, go back to square 1
        header('Location: login-twitter.php');
    } else {
   $twitter_otoken=$_SESSION['oauth_token'];
   $twitter_otoken_secret=$_SESSION['oauth_token_secret'];
   $email=$user_info->email;
        $uid = $user_info->id;
        $username = $user_info->name;
        $loginname = $user_info->screen_name;
         $aboutus = $user_info->description;
         $location = $user_info->location;
         $image = $user_info->profile_image_url_https;
        $user = new User();
        $userdata = $user->checkUser($uid, 'twitter', $username, $email, $loginname, $aboutus, $location, $image, $twitter_otoken, $twitter_otoken_secret);
        if(!empty($userdata)){
            session_start();
            $_SESSION['id'] = $userdata['id'];
      $_SESSION['oauth_id'] = $uid;
            $_SESSION['username'] = $userdata['username'];
            $_SESSION['oauth_provider'] = $userdata['oauth_provider'];
            $_SESSION['uid']=$userdata ['user_id'];
    $_SESSION['uid_token']=uniqid(bin2hex(mcrypt_create_iv(10, MCRYPT_DEV_RANDOM)));
            mysql_query("UPDATE pr_user SET `user_session_token`='{$_SESSION['uid_token']}' WHERE `user_id`='{$res['user_id']}'");
            header("Location: http://mydomain.com/home.php");
        }
    }
} else {
    // Something's missing, go back to square 1
    header('Location: login-twitter.php');
}
?>

6. functions.php

<?php

require 'dbconfig.php';

class User {

    function checkUser($uid, $oauth_provider, $username, $email, $loginname, $aboutus, $location, $image, $twitter_otoken, $twitter_otoken_secret)
{
        $query = mysql_query("SELECT * FROM `pr_user` WHERE user_logintype = '$oauth_provider' AND user_unique_id = '$uid'") or die(mysql_error());
        $result = mysql_fetch_array($query);
        if (!empty($result)) {
            # User is already present
        } else {
            #user not present. Insert a new Record
            list($city,$state) = explode(' ',$location);
            $ip = $_SERVER['REMOTE_ADDR'];
            $query = mysql_query("INSERT INTO `pr_user` (`user_type`, `user_logintype`, `user_unique_id`, `user_email`, `user_login`, `user_name`, `user_city`, `user_state`, `user_image`, `user_info`, `user_ip`)
  VALUES ('user', '$oauth_provider', $uid, '$email', '$loginname', '$username', '$city', '$state', '$image', '$aboutus', '$ip')") or die(mysql_error());
            $query = mysql_query("SELECT * FROM `pr_user` WHERE user_logintype = '$oauth_provider' AND user_unique_id = '$uid'");
            $result = mysql_fetch_array($query);
            return $result;
        }
        return $result;
    }
}

?>

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