C++教程 https://www.runoob.com/cplusplus/cpp-tutorial.html
C++语法 https://www.runoob.com/cplusplus/cpp-basic-syntax.html
Python https://www.runoob.com/python/att-dictionary-len.html
YII2框架 https://www.yiichina.com/doc/guide/2.0
Redis https://www.runoob.com/redis/redis-install.html
Laravel8视频 https://www.bilibili.com/video/av543168512/
laravel-layui-admin https://www.oschina.net/news/109650/laravel-layui-admin-released
微信支付 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_2