如果file_exists（）为TRUE，则使用tempnam（）为$ _FILES [“file”] [“name”]提供唯一名称

Question

PHP newbie here..

I am trying to create an if statement that will change the name of $_FILES["file"]["name"] to something unique if file_exists() comes back true.

My code is given below.. I tried to use tempnam() but I'm not 100% sure as to how to implement it using PHP.

if (file_exists("upload/" . $_FILES["file"]["name"]))
      {
      $_FILES["file"]["name"] = "image/tempnam('',newsFeed)";//this is my problem
      $dialog = $_FILES["file"]["name"] . " already exists. ";
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
      }

Is there a better way to do this because right now I'm just getting a php error:

Warning: move_uploaded_file(upload/image/tempnam('',newsFeed)) [function.move-uploaded-file]: failed to open stream: No such file or directory

The directory does exist because the upload form works with files that don't have the same name.

Any sort of help or guidance would be appreciated!

Answer 1

Replace

  $_FILES["file"]["name"] = "image/tempnam('',newsFeed)";

With

  $_FILES["file"]["name"] = "image/".tempnam('',"newsFeed");

http://www.php.net/manual/en/function.tempnam.php