Zistenie URL v php

<?php

function aktualnaurl() {
$urlstranky = 'http';
if ($_SERVER["HTTPS"] == "on") {$urlstranky .= "s";}
$urlstranky .= "://";
if ($_SERVER["SERVER_PORT"] != "80") {
$urlstranky .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
} else {
$urlstranky .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
return $urlstranky;
}

echo aktualnaurl();

?>