Notice: Undefined index: oauth_token in C:\xampp\htdocs\twitterapi\callback.php on line 9

[danish-manzoor]

Notice: Undefined index: oauth_token in C:\xampp\htdocs\twitterapi\callback.php on line 5 Here is my all code index.php session_start(); require_once 'autoload.php'; use Abraham\TwitterOAuth\TwitterOAuth; define('CONSUMER_KEY', 'Vn3Q6iF0N5CTelifVP7VP6cgq'); // add your app consumer key between single quotes define('CONSUMER_SECRET', '5rt9AWrmJeV3UtGfU1cSS8G1tPg4GGNSYY6kSHsTMgvcMsTQDW'); // add your app consumer secret key between single quotes define('OAUTH_CALLBACK', 'https://127.0.0.1/twitterapi/callback.php'); // your app callback URL if (!isset($_SESSION['access_token'])) { $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET); $request_token = $connection->oauth('oauth/request_token', array('oauth_callback' => OAUTH_CALLBACK)); $_SESSION['oauth_token'] = $request_token['oauth_token']; $_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret']; $url = $connection->url('oauth/authenticate', array('oauth_token' => $request_token['oauth_token'])); echo $url; echo 'Login to Twitter'; } else { $access_token = $_SESSION['access_token']; $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $access_token['oauth_token'], $access_token['oauth_token_secret']); $user = $connection->get("account/verify_credentials"); echo $user->screen_name; } callback.php

session_start(); require 'autoload.php'; use Abraham\TwitterOAuth\TwitterOAuth; if(isset($_REQUEST['oauth_verifier'],$_REQUEST['oauth_token']) && $_REQUEST['oauth_token']=== $_SESSION['oauth_token']){ $request_token = []; $request_token['oauth_token'] = $_SESSION['oauth_token']; $request_token['oauth_token_secret'] = $_SESSION['oauth_token_secret']; $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $request_token['oauth_token'], $request_token['oauth_token_secret']); $access_token = $connection->oauth("oauth/access_token", array("oauth_verifier" => $_REQUEST['oauth_verifier'])); $_SESSION['access_token'] = $access_token; // redirect user back to index page header('Location: ./'); }