Illuminate\Routing\UrlGenerator::assetFrom PHP Method

    public function assetFrom($root, $path, $secure = null)
    {
        // Once we get the root URL, we will check to see if it contains an index.php
        // file in the paths. If it does, we will remove it since it is not needed
        // for asset paths, but only for routes to endpoints in the application.
        $root = $this->getRootUrl($this->getScheme($secure), $root);
        return $this->removeIndex($root) . '/' . trim($path, '/');
    }

 /**
  * Generate a URL to an asset from a custom root domain such as CDN, etc.
  *
  * @param string $root
  * @param string $path
  * @param bool|null $secure
  * @return string 
  * @static 
  */
 public static function assetFrom($root, $path, $secure = null)
 {
     return \Illuminate\Routing\UrlGenerator::assetFrom($root, $path, $secure);
 }