PHP File Upload, files disappearing from /tmp before move_uploaded_files

Question

I have a very basic upload script, probably lifted straight off the php.net/move_upload_files function page.

move_uploaded_file() is failed because it canno

Answer 1

It may also be that you destination folder does not exists or you don't have write permission.

Answer 2

Simple test to do right before the move_uploaded_file() function:

if (!file_exists("upload")) {
  if (mkdir("upload")) {
    echo "Upload directory created!";
  }
  else {
    die( "Invalid upload directory!" );
  }
}
move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);

Answer 3

The file is removed after the script finishes executing. If you run your script, and then check the /tmp/ folder, the file will not be there no matter what.

Answer 4

You are using the return value of move_uploaded_file() the wrong way round:

if(move_uploaded_file($_FILES['userfile']['tmp_name'], $upload_file))
{
    $result['error'] = 'true';
}
else
{
    $result['error'] = 'false';
    $result['file_loc'] = $upload_file;
}

Answer 5

For future reference this can also happen when Apache does not have access to the destination directory (Remember to change the ACLs !!).

Answer 6

I've had this problem myself. In my case php was uploading to the wrong tmp folder. Instead of using the domains tmp folder (in a virtual host on plesk) it was uploading straight to the OS temporary folder.

Check the settings of your temporary folders