Example of php reading directory folder list

/**
* Function to read directory list
* edit: bbs.it-home.org
*/
function GetFolders( $resourceType, $currentFolder )
{
 // Map the virtual path to the local server path.
 $sServerDir = ServerMapFolder( $resourceType, $currentFolder, 'GetFolders' ) ;
 // Array that will hold the folders names.
 $aFolders = array() ;
 $oCurrentFolder = opendir( $sServerDir ) ;
 while ( $sFile = readdir( $oCurrentFolder ) )
 {
  if ( $sFile != '.' && $sFile != '..' && is_dir( $sServerDir . $sFile ) )
   $aFolders[] = '' ;
 }
 closedir( $oCurrentFolder ) ;
 // Open the "Folders" node.
 echo "" ;
 natcasesort( $aFolders ) ;
 foreach ( $aFolders as $sFolder )
  echo $sFolder ;
 // Close the "Folders" node.
 echo "" ;
}