function __construct($orientation = 'P', $unit = 'mm', $size = 'A4')
{
parent::__construct($orientation, $unit, $size);
$this->lineHeightPadding = 30 / $this->k;
$this->SetAutoPageBreak(false);
$existed = in_array("var", stream_get_wrappers());
if (!$existed) {
stream_wrapper_register("var", '\\PhpSigep\\Pdf\\VariableStream') or die("Failed to register protocol");
//stream_wrapper_unregister("var");
}
}