injectToolbar example

if (self::DISABLED === $this->mode
            || !$response->headers->has('X-Debug-Token')
            || $response->isRedirection()
            || ($response->headers->has('Content-Type') && !str_contains($response->headers->get('Content-Type') ?? '', 'html'))
            || 'html' !== $request->getRequestFormat()
            || false !== stripos($response->headers->get('Content-Disposition', ''), 'attachment;')
        ) {
            return;
        }

        $this->injectToolbar($response, $request, $nonces);
    }

    /** * Injects the web debug toolbar into the given Response. */
    protected function injectToolbar(Response $response, Request $request, array $nonces): void
    {
        $content = $response->getContent();
        $pos = strripos($content, '</body>');

        if (false !== $pos) {