PHP：如何只从根目录中搜索文件，而不从其他文件夹中搜索？

我为搜索引擎爬虫器/索引器提供了带有$baseurl的php代码。现在，下面的代码为根html文件以及所有其他文件夹（以及其他html文件）编制索引

我工作的网站是我只想从根目录索引html文件，而不需要任何其他文件夹或子文件夹。因此，我必须修改以下代码中的某些内容：

    //Baselink to search with trailing slash
    var $baseurl = "https://neculaifantanaru.com/";
    // var $baseurl = "http://www.yoursite.com/aSubDirectory/";

    //Serverpath of your baseurl - including trailing slash (something like 
   /users/mac/www/envato.homac.at/htdocs/demos/LiveSearch/) ... ONLY necessary for thumbnail creation
    var $basepath = "/users/envato/www/neculaifantanaru.com/htdocs/";

  //disable indexing of paths above basurl path
  //makes only sense when you are using a subdirectory below your root of the website and only like to 
  stay there
  var $dontIndexUpperDirsOfBaseUrl = false;   //basurl parent paths will be followed
  // var $dontIndexUpperDirsOfBaseUrl = true;   //basurl parent paths won't be followed

  //absolute URL to you ls folder with trailing slash
  var $lsurl = "https://neculaifantanaru.com/ls/";

  //search results page to prevent from heavy load waitings - within $baseurl
  var $searchresultspage = "search.php";

  //excluding files and directories from indexing under $basedir beginning with:
  //this means the links on these pages won't be followed,
  //works with pdf files too
  //regular expressions can be used
  // var $excl = array(".*-dates/",
  //                   "secret.html",
  //                   "hide",
  //                   );
  var $excl = false;

  //including files and directories under $basedir with:
  //don't forget trailing slashes for directories
  //you can set it to false too
  //these pages will be indexed, the links on it and its content
  //works with pdf files too
  // var $incl = array("hallo3.txt",
  //                   );
  var $incl = false;