Zend framework2 如何在zendframework2中设置文件下载的正确路径

我的控制器：

public function downloadAction()
    {
        $param['filename'] = $this->params()->fromRoute('filename');
$param['foldername'] = $this->params()->fromRoute('foldername');
    $fileName = $param['filename']; //bala.pdf
    $folderName = $param['foldername'];  //j1005

$fileContents = file_get_contents($fileName);

$response = $this->getResponse();
$response->setContent($fileContents);

$headers = $response->getHeaders();
$headers->clearHeaders()
    ->addHeaderLine('Content-Type', 'application/pdf')
    ->addHeaderLine('Content-Disposition', 'attachment; filename="' .$fileName . '"')
    ->addHeaderLine('Content-Length', strlen($fileContents));


return $this->response;
}

---

我的文件位置是./data/basepaper/j1005/bala.pdf，但我不知道如何设置下载文件的路径

正确分配变量（例如在使用前初始化空数组）和使用变量（数组仅用于再次分配变量…）可能对您有好处

关于当前的问题，您需要了解ZF2上文件管理的基本知识，因此请阅读index.php：

<?php
    /**
     * This makes our life easier when dealing with paths. Everything is relative
     * to the application root now.
     */
    chdir(dirname(__DIR__));

public function downloadAction()
{
    // Combine assignation (unused array, and non initialised...)
    $fileName = $this->params()->fromRoute('filename');
    $folderName = $this->params()->fromRoute('foldername');

    $fileContents = file_get_contents("data/basepaper/{$folderName}/{$fileName}");

    $response = $this->getResponse();
    $response->setContent($fileContents);

    $headers = $response->getHeaders();
    $headers->clearHeaders()
            ->addHeaderLine('Content-Type', 'application/pdf')
            ->addHeaderLine('Content-Disposition', 'attachment; filename="' .$fileName . '"')
            ->addHeaderLine('Content-Length', strlen($fileContents));

    return $this->response;
}