mysqlnd cannot connect to MySQL 4.1+ using the old insecure【解决方法】

【MySQL】mysqlnd cannot connect to MySQL 4.1+ using the old insecure【解决方法】

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. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file. SQL 错误代码: “7335941”.

是采用兼容格式的密码，而 php5.3的php_mysql; php_pdo_mysql 采用的是增强的密码，所以导致两者不匹配，最方便的方式还是更新db的设置，取消 old_passwords
然后在 mysql.mysql.user，更新所有用户的密码, 如:

SET old_passwords =0;
UPDATE mysql.user SET Password =PASSWORD('testpass') WHERE User='testuser' limit 1;
SELECT LENGTH(Password) FROM mysql.user WHERE User='testuser';
FLUSH PRIVILEGES;

转载自:http://lampblog.org/1430.html