wpdb::init_charset PHP Method

    public function init_charset()
    {
        if (function_exists('is_multisite') && is_multisite()) {
            $this->charset = 'utf8';
            if (defined('DB_COLLATE') && DB_COLLATE) {
                $this->collate = DB_COLLATE;
            } else {
                $this->collate = 'utf8_general_ci';
            }
        } elseif (defined('DB_COLLATE')) {
            $this->collate = DB_COLLATE;
        }
        if (defined('DB_CHARSET')) {
            $this->charset = DB_CHARSET;
        }
    }