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

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"]);