src/Uri/UriGenerator.php
public function base($data = null, $secure = false)
    {
        $data = (! is_null($data)) ? $this->url . $data : $this->url . '/';
        return $this->getUrl($data, $secure);
    }
public function base($data = null, $secure = false)
    {
        $data = (! is_null($data)) ? $this->url . $data : $this->url . '/';
        return $this->getUrl($data, $secure);
    }
Get base url for app.

@param string $data
@param bool   $secure

@return string