WordPress：更换媒体文件上传默认路径

默认WordPress上传图片或者附件都会在wp-content/uploads目录中。我们有些朋友希望更换目录，这里我们如何设置呢？

function change_upload_dir($uploads) {
    $siteurl = get_option( 'siteurl' );
    $uploads['path'] = WP_CONTENT_DIR . '/newurl';
    $uploads['url'] = $siteurl . '/wp-content/newurl';
    $uploads['subdir'] = '';
    $uploads['basedir'] = $uploads['path'];
    $uploads['baseurl'] = $uploads['url'];
    $uploads['error'] = false;
    return $uploads;
  }
  add_filter('upload_dir', 'change_upload_dir');