$defaults = array(
	'name' => '',
	'version' => '',
	'lang' => '',
	'url' => '',
	'xp' => '',
	'sp' => '',
	'adena' => '',
	'date' => '',
	'desc' => ''
);

$input = array_intersect_key($_POST, $defaults);

$missing = array_diff_key($input, $defaults);
if($missing) {
	foreach($missing as $key => $v) {
		echo "$key is a required field<br>";
	}
}