disk_free_space

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

disk_free_spaceReturns available space on filesystem or disk partition

설명

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.

인수

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.

반환값

Returns the number of available bytes as a float 실패 시 FALSE를 반환합니다.

예제

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:");
?>

주의

Note: 이 함수는 원격 파일을 다루지 못합니다. 파일은 서버 파일시스템을 통해서 사용 가능해야만 합니다.

참고

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User Contributed Notes 8 notes

up
48
wiede at gmx dot net
9 years ago
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 />';
?>
up
15
sam
11 years ago
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
up
14
Anonymous
6 years ago
$si_prefix = array( 'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB' );

you are missing the petabyte after terabyte

'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB'

should look like

'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'
up
6
Nitrogen
13 years ago
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.
up
5
root at mantoru dot de
12 years ago
Note that disk_free_space() does an open_basedir check.
up
0
somedude
3 years ago
With respect to Linux filesystems, I'll point out that this function returns the space available in the current volume or mountpoint, not the total physical disk space.  That is, this function used on the '/root' volume shows the free space in /root, which is different from '/home', and so on.
up
-2
pavel at sunhater dot com
1 year ago
<?php

function size($size, array $options=null) {

   
$o = [
       
'binary' => false,
       
'decimalPlaces' => 2,
       
'decimalSeparator' => '.',
       
'thausandsSeparator' => '',
       
'maxThreshold' => false, // or thresholds key
       
'sufix' => [
           
'thresholds' => ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'],
           
'decimal' => ' {threshold}B',
           
'binary' => ' {threshold}iB'
       
]
    ];

    if (
$options !== null)
       
$o = array_replace_recursive($o, $options);

   
$count = count($o['sufix']['thresholds']);
   
$pow = $o['binary'] ? 1024 : 1000;

    for (
$i = 0; $i < $count; $i++)

        if ((
$size < pow($pow, $i + 1)) ||
            (
$i === $o['maxThreshold']) ||
            (
$i === ($count - 1))
        )
            return

               
number_format(
                   
$size / pow($pow, $i),
                   
$o['decimalPlaces'],
                   
$o['decimalSeparator'],
                   
$o['thausandsSeparator']
                ) .

               
str_replace(
                   
'{threshold}',
                   
$o['sufix']['thresholds'][$i],
                   
$o['sufix'][$o['binary'] ? 'binary' : 'decimal']
                );
}

var_dump(size(disk_free_space('/')));
// string(8) "14.63 GB"
var_dump(size(disk_free_space('/'), ['binary' => true]));
// string(9) "13.63 GiB"
var_dump(size(disk_free_space('/'), ['maxThreshold' => 2]));
// string(11) "14631.90 MB"
var_dump(size(disk_free_space('/'), ['binary' => true, 'maxThreshold' => 2]));
// string(12) "13954.07 MiB"

?>
up
-5
Matthieu S
3 years ago
On Windows, this also works with distant files, by using their full network path.

For instance, this will give the % of free disk space on the share "dir" from remote host "server" :
<?php
$path
= "\\\\server\\dir";
echo(
floor(100 * disk_free_space($disk) / disk_total_space($disk)));
?>

It can also work with drive letters mapped to a network path in certain cases.
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