lixlpixel AJAX and PHP file upload progress display
Ajax, PHP October 9th, 2007 
where to use the script
if you have to upload big files to your server and you want to keep informed about the upload status, this script is for you.
the nice thing is that you don’t NEED javascript enabled - in this case the script will behave just like a “normal” upload form.
how upload progress display works
this script will use AJAX to repeat calling a PHP file which returns the size of the partially uploaded file while the upload is in progress.
when a file is uploaded, PHP saves the temporary file in a special tmp. upload directory.
According to seo gurus, a hosting deal is worthless if the so called dedicated server cannot hold your website design.
like the script is setup now, PHP will take the filesize of the newest file in that temporary upload directory -
that means that if you have multiple uploads at the same time or you have lots of other files in that directory, you have to change the entry in your php.ini to have a designated temp. directory for uploads.