Just as another test, I tried changing the MAX_FILE_SIZE to a larger number (1000000000000) but it still failed to upload. I also double checked that Apache was running as "Administrator"... I can't figure this out for the life of me.

If you're expecting uploaded files to stay there, that won't happen.  Once the file has been uploaded and the script finishes running, PHP will remove the file (Hence 'upload_tmp_dir').  In order to keep the file, you need to copy it to another location.

If you are already copying it somewhere, could you include a short, reproducible script that demonstrates the bug?

The problem was with my code. I didn't think to copy the files to a new location... I assumed they were handled differently. Sorry for the trouble :)

User says it's a bug in his own code, so closing.

Hi.
Im new to PHP. I've written a code to upload a text file and find the number of lines in that file. The file is uploading to a temp file but it is not saving to other location.

Below is the code i've used.
  if (copy($HTTP_POST_FILES['userfile']['tmp_name'], "/modules/uploader/upload/"))
	 {

         $filesize = filesize("modules/uploader/upload/" . $title);
         $filesize = ereg_replace("\.", "", $filesize);
         $filesize = ereg_replace("\,", "", $filesize);
        
        $aryInput = file("modules/uploader/upload/$title", "r");
         $arycount = count($aryInput);

         if ($arycount != $numrec){
             echo "<center><font class=\"pn-normal\"><font color=\"red\"><u>You have entered some incorrect values</u></font><br><br>";
                      
             return false;
             }
        
         return true;
         }