FluidTYPO3\Vhs\ViewHelpers\Format\MarkdownViewHelper::transform PHP Method

    public function transform($text)
    {
        $descriptorspec = [0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'a']];
        $process = proc_open($this->markdownExecutablePath, $descriptorspec, $pipes, null, $GLOBALS['_ENV']);
        stream_set_blocking($pipes[0], 1);
        stream_set_blocking($pipes[1], 1);
        stream_set_blocking($pipes[2], 1);
        fwrite($pipes[0], $text);
        fclose($pipes[0]);
        $transformed = stream_get_contents($pipes[1]);
        fclose($pipes[1]);
        $errors = stream_get_contents($pipes[2]);
        fclose($pipes[2]);
        $exitCode = proc_close($process);
        if ('' !== trim($errors)) {
            throw new Exception('There was an error while executing ' . $this->markdownExecutablePath . '. The return code was ' . $exitCode . ' and the message reads: ' . $errors, 1350514144);
        }
        return $transformed;
    }