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;
}