add hide header to xlsx and printhtml

src/Data/Xlsx.php

@@ -5,7 +5,7 @@
     PHP Class     : /Data/Xlsx.php
     Created By    : Siau Pheng ([email protected]).
     Created Date  : November 18th, 2012.
-    Last Modified : October 1st, 2026.
+    Last Modified : October 24th, 2026.
 
     (c) 3FONIA Software; WWW.3FONIA.COM.
 
@@ -130,8 +130,8 @@ final class Xlsx {
             $this->sheet->writeTo('A'.(string) $this->baris, '');
     }
 
-    public function show_headers(): void {
-        $this->sheet->writeHeader(array_column($this->atabel, 'n'))
+    public function show_headers(bool $is_hide=false): void {
+        if (!$is_hide) $this->sheet->writeHeader(array_column($this->atabel, 'n'))
             ->applyFontStyleBold()
             ->applyTextCenter()
             ->applyBorder(Style::BORDER_STYLE_THIN);