別wordpressDBを利用

$sankyo_db_name = 'management2';
$sankyo_db_user = 'management2';
$sankyo_db_pass = '';
$sankyo_db_host = 'localhost';

  if($_SERVER['HTTP_HOST'] =='www.sankyo-unyu.co.jp'){
        $wpdb2 = new wpdb($sankyo_db_user, $sankyo_db_pass, $sankyo_db_name, $sankyo_db_host);
        $url = 'https://www.sankyo-unyu.co.jp/sns/';
    }else{
        $wpdb2 = new wpdb($sankyo_db_user, $sankyo_db_pass,'management2_test', $sankyo_db_host);
        $url = 'https://test.sankyo-unyu.co.jp/sns/';
    }
    $wpdb2->set_prefix('wp_');