- https://ithelp.ithome.com.tw/articles/10198913
- https://medium.com/unalai/%E5%8E%9F%E4%BE%86%E5%89%8D%E7%AB%AF%E7%B6%B2%E9%A0%81%E5%88%97%E5%8D%B0-%E4%B8%8D%E6%98%AF%E5%8F%AA%E8%A6%81-window-print-%E5%B0%B1%E5%A5%BD%E4%BA%86-7af44cacf43e
- https://play-php.blogspot.com/2015/02/php_23.html
- https://ithelp.ithome.com.tw/articles/10226331
