The first thing I notice is in your savedata() function you are trying to access some global variables that aren't declared as global:
PHP Code:
$size = "'" . $size . "'";
$type = "'" . $type . "'";
$name = "'" . $name . "'";
$content = "'" . $content . "'";
Either add those to the global declaration, or access them in your function VIA the $_FILES array.