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disk_total_space> <dirname
[edit] Last updated: Sat, 12 May 2012

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disk_free_space

(PHP 4 >= 4.1.0, PHP 5)

disk_free_spaceReturns available space on filesystem or disk partition

Description

float disk_free_space ( string $directory )

Given a string containing a directory, this function will return the number of bytes available on the corresponding filesystem or disk partition.

Parameters

directory

A directory of the filesystem or disk partition.

Note:

Given a file name instead of a directory, the behaviour of the function is unspecified and may differ between operating systems and PHP versions.

Return Values

Returns the number of available bytes as a float or FALSE on failure.

Examples

Example #1 disk_free_space() example

<?php
// $df contains the number of bytes available on "/"
$df disk_free_space("/");

// On Windows:
$df_c disk_free_space("C:");
$df_d disk_free_space("D:");
?>

Notes

Note: This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.

See Also



disk_total_space> <dirname
[edit] Last updated: Sat, 12 May 2012
 
add a note add a note User Contributed Notes disk_free_space
crrodriguez at opensuse dot org 20-Dec-2011 01:54
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 11-Apr-2011 05:36
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 17-Dec-2008 01:52
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 18-Feb-2008 11:27
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 06-Dec-2007 08:25
Note that disk_free_space() does an open_basedir check.
Nitrogen 10-Jan-2007 05:50
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 04-Dec-2006 03:33
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 12-Jul-2006 07:13
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).$suffix;
    }
?>
Ashraf M Kaabi 01-Mar-2005 08:38
and also you can know the used space , in this
example :
<?
function disk_used_space($drive)
{
    return
disk_total_space("$drive:") - disk_free_space("$drive:");
}

echo
disk_used_space('C');
?>

 
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