解决报错 MySQL 8 的 SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client

使用 PHP 连接 MySQL 8 时：

SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client

在 index.php 中打印：

phpinfo()

页面查找关键词 caching_sha2_password ，如未找到，修改 MySQL 验证密码方式为 mysql_native_password：

export MYSQL_PWD=secret
mysql --user="root" -e "ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'secret';"
mysql --user="root" -e "GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION;"
mysql --user="root" -e "FLUSH PRIVILEGES;"