php 文件目录大小统计函数(自动计算Bytes，KB，MB，GB)

//代码也可以用于统计目录数
//格式化输出目录大小 单位：Bytes，KB，MB，GB

function getDirectorySize($path)
{
$totalsize = 0;
$totalcount = 0;
$dircount = 0;
if ($handle = opendir ($path))
{
while (false !== ($file = readdir($handle)))
{
$nextpath = $path . '/' . $file;
if ($file != '.' && $file != '..' && !is_link ($nextpath))
{
if (is_dir ($nextpath))
{
$dircount++;
$result = getDirectorySize($nextpath);
$totalsize += $result['size'];
$totalcount += $result['count'];
$dircount += $result['dircount'];
}
elseif (is_file ($nextpath))
{
$totalsize += filesize ($nextpath);
$totalcount++;
}
}
}
}
closedir ($handle);
$total['size'] = $totalsize;
$total['count'] = $totalcount;
$total['dircount'] = $dircount;
return $total;
}

路径 : $path

//size() 统计文件大小
function size($byte)
{
if($byte $unit="B";
}
else if($byte $byte=round_dp($byte/1024, 2);
$unit="KB";
}
else if($byte $byte=round_dp($byte/1024, 2);
$unit="KB";
}
else if($byte $byte=round_dp($byte/1024, 2);
$unit="KB";
}
else if ($byte $byte=round_dp($byte/1048576, 2);
$unit="MB";
}
else if ($byte $byte=round_dp($byte/1048576,2);
$unit="MB";
}
else if ($byte $byte=round_dp($byte/1048576, 2);
$unit="MB";
}
else {
$byte=round_dp($byte/1073741824, 2);
$unit="GB";
}

$byte .= $unit;
return $byte;
}

function round_dp($num , $dp)
{
$sh = pow(10 , $dp);
return (round($num*$sh)/$sh);
}