index-w.php

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
//start session
session_start();

//Include Twitter config file && User class
//include_once 'twConfig.php';
include 'EpiTwitter/EpiCurl.php';
include 'EpiTwitter/EpiOAuth.php';
include 'EpiTwitter/EpiTwitter.php';
include 'EpiTwitter/TwitterConfig.php';
include_once 'User.php';
//echo $redirectURL;die;
//If OAuth token not matched
if(isset($_REQUEST['oauth_token']) && $_SESSION['token'] !== $_REQUEST['oauth_token']){
    //Remove token from session
    unset($_SESSION['token']);
    unset($_SESSION['token_secret']);
}
//If user already verified 
if(isset($_SESSION['status']) && $_SESSION['status'] == 'verified' && !empty($_SESSION['request_vars'])){
    //Retrive variables from session
    $username         = $_SESSION['request_vars']['screen_name'];
    $twitterId        = $_SESSION['request_vars']['user_id'];
    $oauthToken       = $_SESSION['request_vars']['oauth_token'];
    $oauthTokenSecret = $_SESSION['request_vars']['oauth_token_secret'];
    $profilePicture   = $_SESSION['userData']['picture'];
    
    /*
     * Prepare output to show to the user
     */
    $twClient = new EpiTwitter($consumerKey, $consumerSecret, $oauthToken, $oauthTokenSecret);
    
    //If user submits a tweet to post to twitter
    if(isset($_POST["updateme"])){
        $my_update = $twClient->post('statuses/update', array('status' => $_POST["updateme"]));
    }
    
    //Display username and logout link
    $output = '<div class="welcome_txt">Welcome <strong>'.$username.'</strong> (Twitter ID : '.$twitterId.'). <a href="logout.php">Logout</a>!</div>';
    
    //Display profile iamge and tweet form
    $output .= '<div class="tweet_box">';
    $output .= '<img src="'.$profilePicture.'" width="120" height="110"/>';
    $output .= '<form method="post" action=""><table width="200" border="0" cellpadding="3">';
    $output .= '<tr>';
    $output .= '<td><textarea name="updateme" cols="60" rows="4"></textarea></td>';
    $output .= '</tr>';
    $output .= '<tr>';
    $output .= '<td><input type="submit" value="Tweet" /></td>';
    $output .= '</tr></table></form>';
    $output .= '</div>';
    
    //Get latest tweets
    $myTweets = $twClient->get('statuses/user_timeline', array('screen_name' => $username, 'count' => 5));
    
    //Display the latest tweets
    $output .= '<div class="tweet_list"><strong>Latest Tweets : </strong>';
    $output .= '<ul>';
    foreach($myTweets  as $tweet){
        $output .= '<li>'.$tweet->text.' <br />-<i>'.$tweet->created_at.'</i></li>';
    }
    $output .= '</ul></div>';
}elseif(isset($_REQUEST['oauth_token']) && $_SESSION['token'] == $_REQUEST['oauth_token']){
    //Call Twitter API
    $twClient = new EpiTwitter($consumerKey, $consumerSecret, $_SESSION['token'] , $_SESSION['token_secret']);
    
    //Get OAuth token
    $access_token = $twClient->getAccessToken($_REQUEST['oauth_verifier']);
    
    //If returns success
    if($twClient->http_code == '200'){
        //Storing access token data into session
        $_SESSION['status'] = 'verified';
        $_SESSION['request_vars'] = $access_token;
        
        //Get user profile data from twitter
        $userInfo = $twClient->get('account/verify_credentials');

        //Initialize User class
        $user = new User();
        
        //Insert or update user data to the database
        $name = explode(" ",$userInfo->name);
        $fname = isset($name[0])?$name[0]:'';
        $lname = isset($name[1])?$name[1]:'';
        $profileLink = 'https://twitter.com/'.$userInfo->screen_name;
        $twUserData = array(
            'oauth_provider'=> 'twitter',
            'oauth_uid'     => $userInfo->id,
            'first_name'    => $fname,
            'last_name'     => $lname,
            'email'         => '',
            'gender'        => '',
            'locale'        => $userInfo->lang,
            'picture'       => $userInfo->profile_image_url,
            'link'          => $profileLink,
            'username'      => $userInfo->screen_name
        );
        
        $userData = $user->checkUser($twUserData);
        
        //Storing user data into session
        $_SESSION['userData'] = $userData;
        
        //Remove oauth token and secret from session
        unset($_SESSION['token']);
        unset($_SESSION['token_secret']);
        
        //Redirect the user back to the same page
        header('Location: ./');
    }else{
        $output = '<h3 style="color:red">Some problem occurred, please try again.</h3>';
    }
}else{
    //Fresh authentication
    $twClient 		= new EpiTwitter($consumerKey, $consumerSecret);
    $request_token 	= $twClient->getRequestToken($redirectURL);
    
    //Received token info from twitter
    $_SESSION['token']         	= $request_token->oauth_token;
    $_SESSION['token_secret']	= $request_token->oauth_token_secret;
    
    //If authentication returns success
    if($twClient->http_code == '200'){
        //Get twitter oauth url
        $authUrl = $twClient->getAuthorizeURL($request_token['oauth_token']);
        
        //Display twitter login button
        $output = '<a href="'.filter_var($authUrl, FILTER_SANITIZE_URL).'"><img src="images/TwitterButton.png" width="151" height="24" border="0" /></a>';
    }else{
        $output = '<h3 style="color:red">Error connecting to twitter! try again later!</h3>';
    }
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Login with Twitter using PHP by CodexWorld</title>
    <link rel='stylesheet' type='text/css' href='style.css'>
</head>
<body>
    <!-- Display login button / profile information -->
    <?php echo $output; ?>
</body>
</html>