http://www.php.net/manual/en/features.file-upload.php
Citat:
The global $_FILES exists as of PHP 4.1.0 (Use $HTTP_POST_FILES instead if using an earlier version). These arrays will contain all the uploaded file information.
The contents of $_FILES from the example form is as follows. Note that this assumes the use of the file upload name userfile, as used in the example script above. This can be any name.
$_FILES['userfile']['name']
The original name of the file on the client machine.
$_FILES['userfile']['type']
The mime type of the file, if the browser provided this information. An example would be "image/gif". This mime type is however not checked on the PHP side and therefore don't take its value for granted.
$_FILES['userfile']['size']
The size, in bytes, of the uploaded file.
$_FILES['userfile']['tmp_name']
The temporary filename of the file in which the uploaded file was stored on the server.
$_FILES['userfile']['error']
The error code associated with this file upload. This element was added in PHP 4.2.0
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Ukratko, koristi $_FILES['myfile'] niz koji ce raditi uvek, bez obzira na setovanje 'register_globals' flaga.