Get current web page URL

function get_url() { 
    $u = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
    return isset($_SERVER['HTTPS']) ? 'https://'.$u: 'http://'.$u;
}

function get_url2() {
  $base_url = ( isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']=='on' ? 'https' : 'http' ) . '://' .  $_SERVER['HTTP_HOST'];
  $url = $base_url . $_SERVER["REQUEST_URI"];
  return $url;
}