$link = mysql_connect('localhost', 'root', 'thiago');
$db_selected = mysql_select_db('system', $link);
$sql = mysql_query("SELECT * FROM tb_user");
$i=0;
while($row = mysql_fetch_row($sql))
{
	$var[$i] = $row;
	$i++;
}
$array = array("id_user","id_centro","id_perfil","ds_user","ds_passwd","ds_json","dt_stamp","dt_acesso");
export::csv($var,$array);