disk_free_space

crrodriguez at opensuse dot org (2011-12-20 13:54:38)

Note that you should not rely on this function on linux BTRFS filesystems.read the FAQ for more info
https://btrfs.wiki.kernel.org/articles/f/a/q/FAQ_1fe9.htm

wiede at gmx dot net (2011-04-11 05:36:01)

Transformation is possible WITHOUT using loops:

<?php 
    $bytes = disk_free_space("."); 
    $si_prefix = array( 'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB' );
    $base = 1024;
    $class = min((int)log($bytes , $base) , count($si_prefix) - 1);
    echo $bytes . '<br />';
    echo sprintf('%1.2f' , $bytes / pow($base,$class)) . ' ' . $si_prefix[$class] . '<br />';
?>

sam (2008-12-17 13:52:16)

Nice, but please be aware of the prefixes.
SI specifies a lower case 'k' as 1'000 prefix.
It doesn't make sense to use an upper case 'K' as binary prefix,
while the decimal Mega (M and following) prefixes in SI are uppercase.
Furthermore, there are REAL binary prefixes since a few years.
Do it the (newest and recommended) "IEC" way:
KB's are calculated decimal; power of 10 (1000 bytes each)
KiB's are calculated binary; power of 2 (1024 bytes each).
The same goes for MB, MiB and so on...
Feel free to read:
http://en.wikipedia.org/wiki/Binary_prefix

rostvertol dot mil at gmail dot com (2008-02-18 11:27:56)

A cleaner and more efficient way of making human readable file sizes:

<?php
function decodeSize( $bytes )
{
    $types = array( 'B', 'KB', 'MB', 'GB', 'TB' );
    for( $i = 0; $bytes >= 1024 && $i < ( count( $types ) -1 ); $bytes /= 1024, $i++ );
    return( round( $bytes, 2 ) . " " . $types[$i] );
}
?>

root at mantoru dot de (2007-12-06 08:25:43)

Note that disk_free_space() does an open_basedir check.

Nitrogen (2007-01-10 17:50:45)

Another easy way to convert bytes to human readable sizes would be this:

<?php
function HumanSize($Bytes)
{
  $Type=array("", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta");
  $Index=0;
  while($Bytes>=1024)
  {
    $Bytes/=1024;
    $Index++;
  }
  return("".$Bytes." ".$Type[$Index]."bytes");
}
?>

It simply takes the $Bytes and divides it by 1024 bytes untill it's no longer over or equal to 1024, meanwhile it increases the $Index to allocate which suffix belongs to the return (adding 'bytes' to the end to save some space).
You can easily modify it so it's shorter, but I made it so it's more clearer.

Nitrogen.

mixar at yandex dot ru (2006-12-04 03:33:10)

This the right function is:
function formatSize($size){
switch (true){
case ($size > 1099511627776):
$size /= 1099511627776;
$suffix = 'TB';
break;
case ($size > 1073741824):
$size /= 1073741824;
$suffix = 'GB';
break;
case ($size > 1048576):
$size /= 1048576;
$suffix = 'MB';
break;
case ($size > 1024):
$size /= 1024;
$suffix = 'KB';
break;
default:
$suffix = 'B';
}
return round($size, 2).$suffix;
}

djneoform at gmail dot com (2006-07-12 07:13:05)

List all drives, free space, total space and percentage free.

<?
    for ($i = 67; $i <= 90; $i++)
    {
        $drive = chr($i);
        if (is_dir($drive.':'))
        {
            $freespace             = disk_free_space($drive.':');
            $total_space         = disk_total_space($drive.':');
            $percentage_free     = $freespace ? round($freespace / $total_space, 2) * 100 : 0;
            echo $drive.': '.to_readble_size($freespace).' / '.to_readble_size($total_space).' ['.$percentage_free.'%]<br />';
        }
    }

    function to_readble_size($size)
    {
        switch (true)
        {
            case ($size > 1000000000000):
                $size /= 1000000000000;
                $suffix = 'TB';
                break;
            case ($size > 1000000000):
                $size /= 1000000000;
                $suffix = 'GB';
                break;
            case ($size > 1000000):
                $size /= 1000000;
                $suffix = 'MB';    
                break;
            case ($size > 1000):
                $size /= 1000;
                $suffix = 'KB';
                break;
            default:
                $suffix = 'B';
        }
        return round($size, 2).$suffix;
    }
?>

Ashraf M Kaabi (2005-03-01 20:38:53)

and also you can know the used space , in this 
example :
<?
function disk_used_space($drive)
{
    return disk_total_space("$drive:") - disk_free_space("$drive:");
}

echo disk_used_space('C');
?>