PHP 连接mysql报错The server requested authentication method unknown

配置完尝试连接mysql出现mysqli_connect(): The server requested authentication method unknown to the这种问题，查了一下发现是mysql8密码机制换成了cha2导致的，解决办法简单，来一个SQL命令：

ALTER USER ‘username’@‘localhost’ IDENTIFIED WITH mysql_native_password BY ‘password’;