File Upload Size Validation using Ajax.

In My Web Form when the user upload the multiple files. The size of the Files should be validated. IS there any Scripts done by any one already..

<input type="hidden" name="MAX_FILE_SIZE" value="30000" />

The above is just HTML so the user can change it.

$_FILES[`userfile`][`size`]
Is provided by the browser so it can also be faked.

filesize($_FILES[`userfile`][`tmp_name`])
Will give the correct file size.

Please rember that directory listing are cached in PHP so it may be nessesary to flush the cache for a correct listing (including file sizes)