Add optional xss protection

[16]

See : https://github.com/yesinteractive/fsl/blob/master/lib/fsl.php#L1136
Something like this…:

function request_uri($env=null)
{
   static $uri = null;
   if(is_null($env))
   {
      if(!is_null($uri)) return $uri;
      $env = env();
    }
   // retrieve $uri depending env
   $uri = rawurldecode(xss_filter($uri));  // store in static $uri variable
   return $uri;
}

if(!defined('xss_filter'))
{
   function xss_filter($str)
   {
        // minimal filtering like https://stackoverflow.com/a/1741568
   }
}