Twitter API PHP

<?

$consumerKey    = ' ';
$consumerSecret = ' ';
$oAuthToken     = ' ';
$oAuthSecret     = ' ';

include "OAuth.php";
include "twitteroauth.php";

$tweet = new TwitterOAuth($consumerKey, $consumerSecret, $oAuthToken, $oAuthSecret);

if (isset($_GET['msg'])) {
    $tweetmsg = $_GET['msg'];
    $tweet->post('statuses/update',array('status' => $tweetmsg));
    echo "Your message has been sent to Twitter.";
} else {
    echo "Your message has not been sent to Twitter.";
}

?>