getPhpDocUrl example

if ($o->trace['class']) {
            $header .= $this->renderer->escape($o->trace['class'].$o->trace['type']);
        }

        if (\is_string($o->trace['function'])) {
            $function = $this->renderer->escape($o->trace['function'].'()');
        } else {
            $function = $this->renderer->escape(
                $o->trace['function']->getName().'('.$o->trace['function']->getParams().')'
            );

            if (null !== ($url = $o->trace['function']->getPhpDocUrl())) {
                $function = '<a href="'.$url.'" target=_blank>'.$function.'</a>';
            }
        }

        $header .= '<dfn>'.$function.'</dfn>';

        $children = $this->renderer->renderChildren($o);
        $header = $this->renderer->renderHeaderWrapper($o, (bool) \strlen($children), $header);

        return '<dl>'.$header.$children.'</dl>';
    }
}

$header .= ' ';
                }
                $header .= $this->renderer->escape('&');
            }

            $header .= '</var> ';
        }

        if (null !== ($s = $o->getName())) {
            $function = $this->renderer->escape($s).'('.$this->renderer->escape($o->getParams()).')';

            if (null !== ($url = $o->getPhpDocUrl())) {
                $function = '<a href="'.$url.'" target=_blank>'.$function.'</a>';
            }

            $header .= '<dfn>'.$function.'</dfn>';
        }

        if (!empty($o->returntype)) {
            $header .= ': <var>';

            if ($o->return_reference) {
                $header .= $this->renderer->escape('&');
            }