Screen\Injection\Url::__construct PHP Method

    public function __construct($url)
    {
        // Prepend http:// if the url doesn't contain it
        if (!stristr($url, 'http://') && !stristr($url, 'https://')) {
            $url = 'http://' . $url;
        }
        if (!$url || !filter_var($url, FILTER_VALIDATE_URL)) {
            throw new InvalidUrlException($url);
        }
        $url = str_replace(array(';', '"', '<?'), '', strip_tags($url));
        $url = str_replace(array('\\077', '\''), array(' ', '/'), $url);
        $this->src = $url;
    }