fwrite（php）并不总是写

Question

使用symfony2的控制器中的php fwrite编写Base64映像，该文件并非总是写入目录中。我写的文件每次都有一个不同的名称，所以对于重写相同的文件。变量$ data已被解码。

 public function convertAction(Request $request){
    $data= $request->request->get('data');
    $filen= $request->request->get('filename');
    $uploadDir = $this->container->getParameter('upload_tmp');
    $file = $uploadDir . $filen;
    $fp = fopen($file, 'wb');
    fwrite($fp, $data);
  fclose($fp);
return new Response() ; 
}

Answer 1

fopen和fwrite在出现错误的情况下返回false。没有写入文件时，您会从这些函数之一中得到错误信息吗？

Answer 2

您可以尝试：

 public function convertAction(Request $request){
    $data= $request->request->get('data');
    $filen= $request->request->get('filename');
    $uploadDir = $this->container->getParameter('upload_tmp');
    $file = $uploadDir . $filen;
    $fp = fopen($file, 'w') or die ('Something went wrong'); // That show is an error ocurres The flag for read/write in binary secure mode "wb" does nothing with fopen()
    fwrite($fp, $data);
  fclose($fp);
return new Response() ; 
}