计算网站根目录下面所有文件的大小

<?php

function getDirSize($dir)
    {
        $handle = opendir($dir);
        while (false!==($FolderOrFile = readdir($handle)))
        {
            if($FolderOrFile != "." && $FolderOrFile != "..")
            {
                if(is_dir("$dir/$FolderOrFile"))
                {
                    $sizeResult += getDirSize("$dir/$FolderOrFile");
                }
                else
                {
                    $sizeResult += filesize("$dir/$FolderOrFile");
                }
            }   
        }
        closedir($handle);
        return $sizeResult;
    }

    // 单位自动转换函数
    function getRealSize($size)
    {
        $kb = 1024;         // Kilobyte
        $mb = 1024 * $kb;   // Megabyte
        $gb = 1024 * $mb;   // Gigabyte
        $tb = 1024 * $gb;   // Terabyte
       
        if($size < $kb)
        {
            return $size." B";
        }
        else if($size < $mb)
        {
            return round($size/$kb,2)." KB";
        }
        else if($size < $gb)
        {
            return round($size/$mb,2)." MB";
        }
        else if($size < $tb)
        {
            return round($size/$gb,2)." GB";
        }
        else
        {
            return round($size/$tb,2)." TB";
        }
    }

    echo getRealSize(getDirSize(dirname($_SERVER['SCRIPT_FILENAME'])));

?>

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方法二：

function dirsize($dir)
{
  $dh = opendir($dir);
  $size = 0;
  while ($file = @readdir($dh))
  {
    if ($file != "." and $file != "..")
    {
      $path = $dir."/".$file;
      if (is_dir($path))
      {
        $size += dirsize($path);
      } elseif (is_file($path)) {
        $size += filesize($path);
      }
    }
  }
  closedir($dh);
  return $size;
}