BuddyPress.org

I have this code, but is not working, any help to make it work with buddypress?

function getUserID() {

$userid = 0;	

if (!empty($_SESSION['basedata']) && $_SESSION['basedata'] != 'null') {

		$_REQUEST['basedata'] = $_SESSION['basedata'];
	}

	if (!empty($_REQUEST['basedata'])) {

		if (function_exists('mcrypt_encrypt')) {

			$key = KEY_A.KEY_B.KEY_C;

			$uid = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($_REQUEST['basedata']), MCRYPT_MODE_CBC, md5(md5($key))), "");

			if (intval($uid) > 0) {

				$userid = $uid;

			}

		} else {

			$userid = $_REQUEST['basedata'];

		}

	}

	if (!empty($_SESSION['userid'])) {

		$userid = $_SESSION['userid'];
	}

	$userid = intval($userid);

	return $userid;
}

function chatLogin($userName,$userPass) {

	$userid = 0;
	if (filter_var($userName, FILTER_VALIDATE_EMAIL)) {

		$sql = ("SELECT * FROM <code>&quot;.TABLE_PREFIX.DB_USERTABLE.&quot;</code> WHERE email ='".$userName."'");

	} else {

		$sql = ("SELECT * FROM <code>&quot;.TABLE_PREFIX.DB_USERTABLE.&quot;</code> WHERE username ='".$userName."'");

	}

	$result = mysql_query($sql);

	$row = mysql_fetch_array($result);

	$salted_password = md5($row1['value'].$userPass.$row['salt']);

	if ($row['password'] == $salted_password) {

		$userid = $row['user_id'];

	}

	if ($userid && function_exists('mcrypt_encrypt')) {

		$key = KEY_A.KEY_B.KEY_C;

		$userid = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $userid, MCRYPT_MODE_CBC, md5(md5($key))));

	}

	return $userid;
}

function getFriendsList($userid,$time) {