A WP-CLI command to rename WordPress' database prefix.
wp package install iandunn/wp-cli-rename-db-prefix
wp rename-db-prefix <new_prefix>
wp rename-db-prefix --dry-run <new_prefix>
wp rename-db-prefix --no-prompt <new_prefix>
You will be prompted for confirmation before the command makes any changes unless using --no-prompt flag.
Use this at your own risk. If something goes wrong, it could break your site. Before running this, make sure to back up your wp-config.php file and run wp db export.
A lot of the code is based on iThemes Security.