Question

The server requested authentication method unknown to the client [caching_sha2_password]

When I run PHP’s mysqli_connect() to connect to a newly created MySQL 8 database cluster I get the following error:

PHP Warning:  mysqli_connect(): The server requested authentication method unknown to the client [caching_sha2_password] in /path/to/test.php on line 2
PHP Warning:  mysqli_connect(): (HY000/2054): The server requested authentication method unknown to the client in /path/to/test.php on line 2

The password encryption I’m using for this user is “Legacy – MySQL 5.x” but that’s not helping.

In https://stackoverflow.com/q/50026939/569976 the poster mentions modifying the “MySQL Server ini file” but as this is a managed DB instance I can’t modify the ini file (not that it’s clear if that’d even help anyway)

Subscribe
Share

Submit an answer
You can type!ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Hi there,

I could suggest following the steps from this answer here:

https://www.digitalocean.com/community/questions/how-to-change-caching_sha2_password-to-mysql_native_password-on-a-digitalocean-s-managed-mysql-database

Also, try to upgrade PHP to 7.2 or newer as well.

Let me know how it goes!

Best,

Bobby