count size disk directory

<?php 
echo '<pre>';




function scan_disk($dir = '', $max_limit = 0) {

	if ($max_limit > 0) {
		
		$total_convert_limit = toByteSize($max_limit);
		$total_size =  $total_convert_limit - folderSize($dir);

		if ($total_size < -1) {
			
			$return_array = array(
				'size_folder_origin'   => folderSize($dir), // total disk size folder
				'size_folder_convert'  => format_size(folderSize($dir)), 
				'free_space' 		   => $total_size, // total sisa folder
				'free_space_convert'   => format_size($total_size), // total sisa folder
				'limit_size'           => $total_convert_limit,
				'limit_size_convert'   => format_size($total_convert_limit),
				'status'               => 0,
				'keterangan'           => 'tidak tersedia'
			);
		} else {
			$return_array = array(
				'size_folder_origin'   => folderSize($dir), // total disk size folder
				'size_folder_convert'  => format_size(folderSize($dir)), 
				'free_space' 		   => $total_size, // total sisa folder
				'free_space_convert'   => format_size($total_size), // total sisa folder
				'limit_size'           => $total_convert_limit,
				'limit_size_convert'   => format_size($total_convert_limit),
				'status'               => 1,
				'keterangan'           => 'tersedia'
			);
		}

	} else {
		
		$return_array = array(
			'size_folder_origin'   => folderSize($dir), // total disk size folder
			'size_folder_convert'  => format_size(folderSize($dir)), 
			'free_space' 		   => 'limit not set', // total sisa folder
			'free_space_convert'   => 'limit not set', // total sisa folder
			'limit_size'           => 'limit not set',
			'limit_size_convert'   => 'limit not set',
			'status'               => 1,
			'keterangan'           => 'tersedia'
		);

	}
	
	return $return_array;
}

function folderSize ($dir)
{
    $size = 0;
    foreach (glob(rtrim($dir, '/').'/*', GLOB_NOSORT) as $each) {
        $size += is_file($each) ? filesize($each) : folderSize($each);
    }
    return $size;
}

function format_size($size) {
  $mod = 1024;
  $units = explode(' ','B KB MB GB TB PB');
  for ($i = 0; $size > $mod; $i++) {
    $size /= $mod;
  }

  return round($size, 2) . ' ' . $units[$i];
}

function toByteSize($p_sFormatted) {
    $aUnits = array('B'=>0, 'KB'=>1, 'MB'=>2, 'GB'=>3, 'TB'=>4, 'PB'=>5, 'EB'=>6, 'ZB'=>7, 'YB'=>8);
    $sUnit = strtoupper(trim(substr($p_sFormatted, -2)));
    if (intval($sUnit) !== 0) {
        $sUnit = 'B';
    }
    if (!in_array($sUnit, array_keys($aUnits))) {
        return false;
    }
    $iUnits = trim(substr($p_sFormatted, 0, strlen($p_sFormatted) - 2));
    if (!intval($iUnits) == $iUnits) {
        return false;
    }
    return $iUnits * pow(1024, $aUnits[$sUnit]);
}

 ?>
 
 
 // ** output ***/
$dir = "D:/Nas/sa";

$SIZE_LIMIT = '2.5GB';
print_r(scan_disk($dir));

 Array
(
    [size_folder_origin] => 2189691130
    [size_folder_convert] => 2.04 GB
    [free_space] => limit not set
    [free_space_convert] => limit not set
    [limit_size] => limit not set
    [limit_size_convert] => limit not set
    [status] => 1
    [keterangan] => tersedia
)

/** setting parameter limit */
$SIZE_LIMIT = '2.5GB';
print_r(scan_disk($dir, $SIZE_LIMIT));

Array
(
    [size_folder_origin] => 2189691130
    [size_folder_convert] => 2.04 GB
    [free_space] => 494663430
    [free_space_convert] => 471.75 MB
    [limit_size] => 2684354560
    [limit_size_convert] => 2.5 GB
    [status] => 1
    [keterangan] => tersedia
)