Client does not support authentication protocol requested by server¶

Troubleshooting¶

Running MySQL v4.1 or newer, the follow error is returned:

Warning: mysql_pconnect(): Client does not support authentication protocol requested by server; consider upgrading MySQL client

New versions of MySQL use an authentication protocol based on a password hashing algorithm that is incompatible with that used by older (pre-4.1) clients. MySQL can be configured to use the old algorithm, however. The MySQL documentation has more information on the issue.