Reference

    {
        return \in_array($this->statusCode, [204, 304]);
    }
 
    /**
     * Cleans or flushes output buffers up to target level.
     *
     * Resulting level can be greater than target level if a non-removable buffer has been encountered.
     *
     * @final
     */
    public static function closeOutputBuffers(int $targetLevel, bool $flush)
    {
        $status = ob_get_status(true);
        $level = \count($status);
        $flags = PHP_OUTPUT_HANDLER_REMOVABLE | ($flush ? PHP_OUTPUT_HANDLER_FLUSHABLE : PHP_OUTPUT_HANDLER_CLEANABLE);
 
        while ($level-- > $targetLevel && ($s = $status[$level]) && (!isset($s['del']) ? !isset($s['flags']) || ($s['flags'] & $flags) === $flags : $s['del'])) {
            if ($flush) {
                ob_end_flush();
            } else {
                ob_end_clean();
            }
        }
    }
 
    /**
     * Checks if we need to remove Cache-Control for SSL encrypted downloads when using IE < 9.
     *
     * @see http://support.microsoft.com/kb/323308
     *
     * @final
     */
    protected function ensureIEOverSSLCompatibility(Request $request)
    {
        if (false !== stripos($this->headers->get('Content-Disposition'), 'attachment') && 1 == preg_match('/MSIE (.*?);/i', $request->server->get('HTTP_USER_AGENT'), $match) && true === $request->isSecure()) {
            if ((int) preg_replace('/(MSIE )(.*?);/', '$2', $match[0]) < 9) {
                $this->headers->remove('Cache-Control');
            }
        }

    {
        echo $this->content;
 
        return $this;
    }
 
    /**
     * Sends HTTP headers and content.
     *
     * @return $this
     */
    public function send()
    {
        $this->sendHeaders();
        $this->sendContent();
 
        if (\function_exists('fastcgi_finish_request')) {
            fastcgi_finish_request();
        } elseif (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
            static::closeOutputBuffers(0, true);
        }
 
        return $this;
    }
 
    /**
     * Sets the response content.
     *
     * Valid types are strings, numbers, null, and objects that implement a __toString() method.
     *
     * @param mixed $content Content that can be cast to string
     *
     * @return $this
     *
     * @throws \UnexpectedValueException
     */
    public function setContent($content)
    {
        if (null !== $content && !\is_string($content) && !is_numeric($content) && !\is_callable([$content, '__toString'])) {
            throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', \gettype($content)));

 
/*
|--------------------------------------------------------------------------
| Run The Application
|--------------------------------------------------------------------------
|
| Once we have the application, we can handle the incoming request
| through the kernel, and send the associated response back to
| the client's browser allowing them to enjoy the creative
| and wonderful application we have prepared for them.
|
*/
 
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
 
$response = $kernel->handle(
    $request = Illuminate\Http\Request::capture()
);
 
$response->send();
 
$kernel->terminate($request, $response);