http://tom4897.info/blog/2013/08/twitter-api-1-1/

tweets.php

<?php  
/* --------------------- */
require "class/twitteroauth.php";  
$twitter_api = new TwitterOAuth (consumer_key, consumer_secret, oauth_token, oauth_token_secret);  
$tweets = $twitter_api -> get ('statuses/user_timeline', array('count' => 5));  

foreach ($tweets as $key => $tweets) {      
	echo "&bull; " . $tweets->text . "<br/>";  
}
?>
OR 
<?php 
/* --------------------- */
// Parameters
$consumer_key = "";
$consumer_secret = "";
$oauth_token = "";
$oauth_token_secret = "";
$tweets_parameters = array('count' => 5);

// call class
require "class/twitteroauth.php";  
$twitter_api = new TwitterOAuth ($consumer_key, $consumer_secret, $oauth_token, $oauth_token_secret);  
// Get tweets
$tweets = $twitter_api -> get ('statuses/user_timeline', $tweets_parameters);  

// Display Tweets
echo '<ul>';
foreach ($tweets as $key => $tweet) {
	$user =  $tweet->user;
	echo "<li><a href='http://twitter.com/{$tweet->id_str}'>Tweet</a> &bull; {$tweet->text}<br/> <i>{$tweet->created_at}</i><br/></li>";
}
echo '</ul>';

// Destroy unnecessary object & variable
unset($twitter_api, $tweets);
?>