public function __construct($save_type, $filesave_name)
{
$this->filesavename = $filesave_name;
if ($save_type == 'gz' and extension_loaded('zlib')) {
$this->savetype = 'gz';
$this->mode = 'wb' . $this->comp_level;
} else {
$this->savetype = 'sql';
$this->mode = 'wb';
}
}