public function __construct($url = null)
{
if ($url) {
$parts = parse_url($url);
if (isset($parts["scheme"])) {
$this->setScheme(new Scheme($parts["scheme"]));
} else {
if (substr($url, 0, 2) === '//') {
$this->makeSchemeless();
}
}
if (isset($parts["user"]) || isset($parts["pass"])) {
$this->setAuthInfo(new AuthInfo($parts["user"], $parts["pass"]));
}
if (isset($parts["host"])) {
$this->setHost(new Host($parts["host"]));
if (isset($parts["port"])) {
$this->host->setPort($parts["port"]);
}
}
if (isset($parts["path"])) {
$this->setPath(new Path($parts["path"]));
}
if (isset($parts["query"])) {
$this->setQuery(new Query($parts["query"]));
}
if (isset($parts["fragment"])) {
$this->setFragment(new Fragment($parts["fragment"]));
}
}
}
