您可以筛选domain_exists, 在注册站点之前运行的检查。如果返回正整数，WordPress将不会创建该站点。尽管名称不同，该过滤器也允许您检查路径。

未测试的示例代码：

add_filter( \'domain_exists\', function( $result, $domain, $path ) {

    // Already taken, no need for further checks.
    if ( $result ) {
        return $result;
    }

    $blacklist = [
        \'domains\' => [
            \'assets.example.com\',
            \'wordpress.example.com\',
        ],
        \'paths\' => [
            \'wp-admin\',
            \'wp-includes\',
            \'wp-content\',
        ],
    ];

    if ( in_array( $domain, $blacklist[\'domains\'] ) ) {
        return 1;
    }

    $path = trim( $path, \'/\' );

    if ( empty ( $path) ) {
        return $result;
    }

    if ( in_array( $path, $blacklist[\'paths\'] ) ) {
        return 1;
    }

    return $result;
}, 10, 3 );