Zend\Diactoros\Response\SapiEmitterTrait::flush PHP Method

flush() private method

Loops through the output buffer, flushing each, before emitting the response.
private flush ( integer | null $maxBufferLevel = null )
$maxBufferLevel integer | null Flush up to this buffer level.
    private function flush($maxBufferLevel = null)
    {
        if (null === $maxBufferLevel) {
            $maxBufferLevel = ob_get_level();
        }
        while (ob_get_level() > $maxBufferLevel) {
            ob_end_flush();
        }
    }