Here are a few options for an article title, based on your content, formatted as a question: **General & Focus on Error Message:** * **How to Fix \'mysqlnd cannot connect to MySQL 4.1 usin

Fixing MySQL Connection Error Due to Insecure Authentication

When attempting to establish a database connection, you may encounter the following error:

Database connection failed: 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 issue occurs due to a mismatch between the versions of PHP and MySQL. MySQL has enhanced its security measures, requiring the use of more secure authentication methods.

Resolution:

1. Update Server Configuration:

   • On your web hosting server (media temple), consult with your host to update the MySQL version to 5.5.16 or later (match the version on your local machine).

2. Disable Insecure Authentication:

   • Locate the "my.cnf" configuration file (e.g., "/etc/my.cnf" or "/opt/lampp/etc/my.cnf").
   • Remove or comment out the line "old_passwords = 1".

3. Restart MySQL:

   • To apply the changes, restart the MySQL service.

4. Reset Passwords:

   • Connect to the MySQL database using an administration tool (e.g., MySQL Workbench or phpMyAdmin).
   • Run the query "SELECT user, Length(Password) FROM mysql.user;" to identify users with insecure passwords (16-character hash).
   • Update the password for each user with insecure authentication using the query "UPDATE mysql.user SET Password = PASSWORD('password') WHERE user = 'username';".

5. Flush Privileges:

   • Execute the query "FLUSH PRIVILEGES;" to propagate the password changes.

Additional Considerations:

• If you're using PHP 5.2 or earlier on the server side, you may need to remove the "old-passwords" flag from the "my.cnf" file to allow outdated authentication methods.
• Ensure that the MySQL root user password is secure, as mentioned in the error message.

The above is the detailed content of Here are a few options for an article title, based on your content, formatted as a question: **General & Focus on Error Message:** * **How to Fix \'mysqlnd cannot connect to MySQL 4.1 usin. For more information, please follow other related articles on the PHP Chinese website!