//遍历子文件夹和文件夹的内容 并且计算出文件的多少
//一个demo 引号替换下
function scan($dir){
  static $i=0;
  static $d=0;
  $dirArr = scandir('.');
  foreach($dirArr as $v){
   if($v!='.' && $v!='..'){
     $dirname = $dir."\\".$v; //子文件夹的目录地址
    if(is_dir($dirname)){
   $count['dir'] = ++$d;
     scan($dirname);
    }
    $count['file'] = ++$i;
   }
  }
  return $count;
}
$count = scan('.');
echo "一共文件{$count['file']}个,文件夹 {$count['dir']}个 ";

//针对当前目录的情况下
$dir = scandir('.');
foreach($dir as $v){
  $base = strrchr($v,'.');
  if($v!='.'){
  if($v == '..'){
   $type ='上级目录';
  }
  //类型不一一举例
  if(is_dir($v)){
   $type ='目录';
  }elseif($base== '.jpg' || $base=='.gif'){
   $type =' 图片文件';
  }elseif($base== '.rar' || $base=='.zip'){
   $type =' 压缩文件';
  }else{
   $type="文件";
  }
  }
}