gistfile1.php

<?php
class TwitterAPI {
	private $_curl_handle;
	private $_curl_info;
	private $_curl_errno;
	private $_curl_errmsg;
	private $_curl_options = array(
		CURLOPT_RETURNTRANSFER	=> true,
		CURLOPT_HEADER			=> false,
		CURLOPT_FOLLOWLOCATION	=> true,
		CURLOPT_ENCODING		=> '',
		CURLOPT_USERAGENT		=> 'tfs',
		CURLOPT_AUTOREFERER		=> true,
		CURLOPT_CONNECTTIMEOUT	=> 60,
		CURLOPT_TIMEOUT			=> 60,
		CURLOPT_MAXREDIRS		=> 10,
		CURLOPT_VERBOSE			=> 1,
	);

	function __construct() {
		$this->_curl_handle = curl_init();
		curl_setopt_array($this->_curl_handle, $this->_curl_options);
	}

	function close() {
		curl_close($this->_curl_handle);
		return;
	}

	function getFriends($user_id) {
		$url	= 'http://twitter.com/friends/ids.json?user_id=' . $user_id;
		curl_setopt($this->_curl_handle, CURLOPT_URL, $url);
		$json	= curl_exec($this->_curl_handle);

		$this->_curl_errno	= curl_errno($this->_curl_handle);
		$this->_curl_errmsg	= curl_error($this->_curl_handle);
		$this->_curl_info	= curl_getinfo($this->_curl_handle);

		return json_decode($json, true);
	}

	function getCurlErrNo() {
		return $this->_curl_errno;
	}
	function getCurlErrMsg() {
		return $this->_curl_errmsg;
	}
	function getCurlInfo() {
		return $this->_curl_info;
	}
}
$twitter = new TwitterAPI();
$friends = $twitter->getFriends(8831502);

print_r($friends);

$twitter->close();
?>