Hi, I just follow this tutorial to change mysql data directory to new location
https://www.digitalocean.com/community/tutorials/how-to-change-a-mariadb-data-directory-to-a-new-location-on-centos-7

Now mysql is running in the new location, but my application still unable to connect to the mysql server with this error:

A PHP Error was encountered
Severity: Warning

Message: mysqli::real_connect(): (HY000/2002): Connection refused

Filename: mysqli/mysqli_driver.php

Line Number: 201

I tried to login via PHPMyAdmin got this error:

#2002 - Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111) — The server is not responding (or the local server's socket is not correctly configured).