*** https://www.cnblogs.com/wuxiumu/p/13390044.html
https://blog.csdn.net/li741350149/article/details/68067724
http://www.zhuozhengsoft.com/PageOffice/?bd_vid=5077926346389381380
https://www.cnblogs.com/itwlp/p/11109280.html
https://blog.csdn.net/gulicms/article/details/81628185
————–试过的链接
https://github.com/PHPOffice/PhpSpreadsheet
里面有sample 只有用git cmd方式才可以把sample目录下载下来，然后把sample目录放到vendor/phpoffice/phpspreadsheet/目录下
就可以该问了 http://xx.com/vendor/phpoffice/phpspreadsheet/sample/index.php
api document https://phpoffice.github.io/PhpSpreadsheet/
other document https://phpspreadsheet.readthedocs.io/en/latest/#installation