Two changes needed for this to run on Ubuntu.

[SEOArcade]

In example code you have used twice "new":

`require_once "vadersentiment.php";

$textToTest = "VADER is smart, handsome, and funny.";

$sentimenter = new new SentimentIntensityAnalyzer();
$result = $sentimenter->getSentiment($textToTest);

print_r($result);`

In vadersentiment:

$this->lexicon_file = realpath(dirname(__FILE__)) . '\\' . $lexicon_file;

to (changing from \ to /, otherwise lexicon wont work):

$this->lexicon_file = realpath(dirname(FILE)) . '/' . $lexicon_file;