MySQL Connection Error: Resolving "mysqlnd Cannot Connect" Issue
When attempting to connect to MySQL, you may encounter the error message: "mysqlnd cannot connect to MySQL 4.1 using the old insecure authentication." This error arises due to a mismatch between the password hashing methods used by the MySQL server and the authentication mechanism employed by the PHP MySQL driver, mysqlnd.
Solution
To resolve this error, you need to update the MySQL password hashing method to the new, more secure format. This involves modifying the MySQL configuration file (my.cnf) as follows:
Set New Passwords for Affected Users:
Connect to the MySQL database and run the following query to identify users with passwords in the old format:
<code class="sql">SELECT user, Length(`Password`) FROM `mysql`.`user`;</code>
For each affected user, update the password using the PASSWORD() function:
<code class="sql">UPDATE mysql.user SET Password = PASSWORD('new_password') WHERE user = 'affected_username';</code>
Flush Privileges:
After updating the passwords, flush the privileges to reflect the changes:
<code class="sql">FLUSH PRIVILEGES;</code>
Note:
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