Twitter\Intents\Tweet::addHashtag PHP Méthode

    public function addHashtag($hashtag)
    {
        $hashtag = \Twitter\Helpers\Validators\Hashtag::trim($hashtag);
        if ($hashtag) {
            if (function_exists('mb_strtolower')) {
                $comparison_hashtag = mb_strtolower($hashtag);
            } else {
                $comparison_hashtag = strtolower($hashtag);
            }
            if (!isset($this->hashtags[$comparison_hashtag])) {
                $this->hashtags[$comparison_hashtag] = $hashtag;
            }
        }
        return $this;
    }