Hello All, i m learning how to use twitter from twitter developer link on Authenticating Requests with OAuth page i was debugging my code with given procedure

on Sending the user to authorization section there is written that

if you are using the callback flow, your oauth_callback should have received back your oauth_token (the same that you sent, your "request token") and a field called the oauth_verifier. You'll need that for the next step.

Here's the response I received:

oauth_token=8ldIZyxQeVrFZXFOZH5tAwj6vzJYuLQpl0WUEYtWc&oauth_verifier=pDNg57prOHapMbhv25RNf75lVRd6JDsni1AJJIDYoTY

my original code is

require_once('twitteroauth/twitteroauth.php');
require_once('config.php');

/* Build TwitterOAuth object with client credentials. */
$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET);

/* Get temporary credentials. */
$request_token = $connection->getRequestToken(OAUTH_CALLBACK);


/* Save temporary credentials to session. */
$_SESSION['oauth_token'] = $token = $request_token['oauth_token'];
$_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret'];
/* If last connection failed don't display authorization link. */
switch ($connection->http_code) {
  case 200:
    /* Build authorize URL and redirect user to Twitter. */
    echo "<br/>Authorize URL:".$url = $connection->getAuthorizeURL($token);
    //header('Location: ' . $url); 
    break;
  default:
    /* Show notification if something went wrong. */
    echo 'Could not connect to Twitter. Refresh the page or try again later.';
}

and i m getting Authorize URL:

https://twitter.com/oauth/authenticate?oauth_token=BHqbrTjsPcyvaAsfDwfU149aAcZjtw45nhLBeG1c

i m not getting above URL having oauth_verifier. please tell me from where do i see/debug that url??