mysqlnd cannot connect 连接错误处理方法

mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD(‘your_existing_password’). This will store a new, and more secure, hash value in mysql.user. 

使用phpadmin连接上远程数据库，执行以下sql即可：

SET SESSION old_passwords=FALSE;
 
SET PASSWORD = PASSWORD('yourpassword');