<?php
showDir('../../file');
function showDir($path,$dep=0){
 $pos = opendir($path);
 while(false!==$file=readdir($pos)){
  if($file=='.'||$file=='..') continue;
  echo str_repeat(" ",$dep*4),$file.'</br>';
  if(is_dir($path.'/'.$file)){
   $func = __FUNCTION__;
   $func($path.'/'.$file,$dep+1);
  }
 }
}

<?php
$res = showDir('../../file');
echo '<pre>';
print_r($res);
function showDir($path){
 $pos = opendir($path);
 $next = array();
 while(false!==$file=readdir($pos)){
  if($file=='.'||$file=='..') continue;
  $fileinfo = array();
  $fileinfo['name'] = $file;
  if(is_dir($path.'/'.$file)){
   $fileinfo['type'] = 'dir';
   $func = __FUNCTION__;
   $fileinfo['next'] = $func($path.'/'.$file);
  }else{
   $fileinfo['type'] = 'file';
  }
  $next[] = $fileinfo;
 }
 closedir($pos);
 return $next;
}

<?php
showDir('../../file/sim');
function showDir($path,$dep=0){
 $pos = opendir($path);
 while(false!==$file=readdir($pos)){
  if($file=='.'||$file=='..') continue;
//  echo str_repeat(" ",$dep*4),$file.'</br>';
  if(is_dir($path.'/'.$file)){
   $func = __FUNCTION__;
   $func($path.'/'.$file,$dep+1);
  }else{
   unlink($path.'/'.$file);
  }
 }
 rmdir($path);
 closedir($pos);
}

iconv('gbk',utf-8',file);

iconv(utf-8','gbk',file);