Where does PHP save temporary files during uploading? <p>I am using XAMPP on Windows. By printing <code>$_FILES["file"]["tmp_name"]</code>, it seems that the temporary file was saved at C:\xampp\tmp\phpABCD.tmp. But I cannot see it on the filesystem of the server. However, the file can be moved or copied via <code>move_uploaded_file()</code>, <code>rename()</code>, or <code>copy()</code>. So where does PHP actually save temporary files during uploading?</p>