mysqli_connect: authentication method unknown to the client [caching_sha2_password]

mysql-8.0 新特性

1. 認證方法更新爲了： caching_sha2_password
2. 字符集改成了默認： utf8mb4

mysqli_connect: authentication method unknown to the client [caching_sha2_password]

解決辦法：

將認證方式和字符集改爲之前的方式

1. 編輯mysql配置文件

vim  /etc/my.cnf

[mysqld]
default_authentication_plugin=mysql_native_password
character_set_server =utf8

2. 重啓mysql 服務

service mysqld restart

3. 創建數據庫

create database dbname charset=utf8 collate=utf8_general_ci;

或更新數據庫

alter database dbname charset=utf8 collate=utf8_general_ci;

4. 創建用戶，賦予權限

create user 'root'@'%' identified with mysql_native_password by '123456';
grant all on dbname.* to 'root'@'%';
flush privileges;