首先是8.0.12的错误日志：

2020-04-30T07:07:53.966423Z 0 [System] [MY-010910] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe: Shutdown complete (mysqld 8.0.12)  MySQL Community Server - GPL.

2020-04-30T07:07:56.331558Z 0 [System] [MY-010116] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe (mysqld 8.0.12) starting as process 4568

2020-04-30T07:07:58.501682Z 0 [ERROR] [MY-011071] [Server] unknown variable 'query_cache_size=0'

2020-04-30T07:07:58.502682Z 0 [ERROR] [MY-010119] [Server] Aborting

2020-04-30T07:08:00.015769Z 0 [System] [MY-010910] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe: Shutdown complete (mysqld 8.0.12)  MySQL Community Server - GPL.

2020-04-30T07:08:02.372904Z 0 [System] [MY-010116] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe (mysqld 8.0.12) starting as process 7796

2020-04-30T07:08:04.559029Z 0 [ERROR] [MY-011071] [Server] unknown variable 'query_cache_size=0'

2020-04-30T07:08:04.560029Z 0 [ERROR] [MY-010119] [Server] Aborting

2020-04-30T07:08:06.082116Z 0 [System] [MY-010910] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe: Shutdown complete (mysqld 8.0.12)  MySQL Community Server - GPL.

2020-04-30T07:08:08.344245Z 0 [System] [MY-010116] [Server] D:\phpstudy_pro\COM\..\Extensions\MySQL8.0.12\\bin\mysqld.exe (mysqld 8.0.12) starting as process 12456

2020-04-30T07:08:10.500369Z 0 [ERROR] [MY-011071] [Server] unknown variable 'query_cache_size=0'

之后是5.7.26的错误日志：

2020-04-30T03:54:49.877851Z 0 [ERROR] unknown variable 'table_cache=256'

2020-04-30T03:54:49.903852Z 0 [ERROR] Aborting

2020-04-30T03:54:52.377994Z 0 [ERROR] unknown variable 'table_cache=256'

2020-04-30T03:54:52.378994Z 0 [ERROR] Aborting

2020-04-30T03:54:55.336163Z 0 [ERROR] unknown variable 'table_cache=256'

2020-04-30T03:54:55.337163Z 0 [ERROR] Aborting

新手还没学习PHP 安装环境这卡了好久了 咋整 谢谢大家！

请大家不要复制网上的办法了... 本电脑重来没有安装过Mysql 本地服务也找过了，没有这个，VC库几乎装全了就是运行不了！