PHP: disk_free_space - Manual (original) (raw)
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
disk_free_space — Returns available space on filesystem or disk partition
Description
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](reserved.constants.php#constant.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 onremote files as the file to be examined must be accessible via the server's filesystem.
Found A Problem?
14 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;
<span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>c</mi><mi>l</mi><mi>a</mi><mi>s</mi><mi>s</mi><mo>=</mo><mi>m</mi><mi>i</mi><mi>n</mi><mo stretchy="false">(</mo><mo stretchy="false">(</mo><mi>i</mi><mi>n</mi><mi>t</mi><mo stretchy="false">)</mo><mi>l</mi><mi>o</mi><mi>g</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">class = min((int)log(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6944em;"></span><span class="mord mathnormal">c</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">a</span><span class="mord mathnormal">ss</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">min</span><span class="mopen">((</span><span class="mord mathnormal">in</span><span class="mord mathnormal">t</span><span class="mclose">)</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.03588em;">g</span><span class="mopen">(</span></span></span></span>bytes , <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>b</mi><mi>a</mi><mi>s</mi><mi>e</mi><mo stretchy="false">)</mo><mo separator="true">,</mo><mi>c</mi><mi>o</mi><mi>u</mi><mi>n</mi><mi>t</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">base) , count(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">ba</span><span class="mord mathnormal">se</span><span class="mclose">)</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathnormal">co</span><span class="mord mathnormal">u</span><span class="mord mathnormal">n</span><span class="mord mathnormal">t</span><span class="mopen">(</span></span></span></span>si_prefix) - 1);
echo $bytes . '<br />';
echo sprintf('%1.2f' , <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>b</mi><mi>y</mi><mi>t</mi><mi>e</mi><mi>s</mi><mi mathvariant="normal">/</mi><mi>p</mi><mi>o</mi><mi>w</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">bytes / pow(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">b</span><span class="mord mathnormal" style="margin-right:0.03588em;">y</span><span class="mord mathnormal">t</span><span class="mord mathnormal">es</span><span class="mord">/</span><span class="mord mathnormal">p</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mopen">(</span></span></span></span>base,$class)) . ' ' . <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><msub><mi>i</mi><mi>p</mi></msub><mi>r</mi><mi>e</mi><mi>f</mi><mi>i</mi><mi>x</mi><mo stretchy="false">[</mo></mrow><annotation encoding="application/x-tex">si_prefix[</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1.0361em;vertical-align:-0.2861em;"></span><span class="mord mathnormal">s</span><span class="mord"><span class="mord mathnormal">i</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.1514em;"><span style="top:-2.55em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight">p</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.2861em;"><span></span></span></span></span></span></span><span class="mord mathnormal">re</span><span class="mord mathnormal" style="margin-right:0.10764em;">f</span><span class="mord mathnormal">i</span><span class="mord mathnormal">x</span><span class="mopen">[</span></span></span></span>class] . '<br />';
?>11 years ago
$si_prefix = array( 'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB' );
you are missing the petabyte after terabyte
'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB'
should look like
'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'16 years ago
Nice, but please be aware of the prefixes.
SI specifies a lower case 'k' as 1'000 prefix.
It doesn't make sense to use an upper case 'K' as binary prefix,
while the decimal Mega (M and following) prefixes in SI are uppercase.
Furthermore, there are REAL binary prefixes since a few years.
Do it the (newest and recommended) "IEC" way:
KB's are calculated decimal; power of 10 (1000 bytes each)
KiB's are calculated binary; power of 2 (1024 bytes each).
The same goes for MB, MiB and so on...
Feel free to read:
http://en.wikipedia.org/wiki/Binary_prefix18 years ago
Note that disk_free_space() does an open_basedir check.18 years ago
Another easy way to convert bytes to human readable sizes would be this:
<?php
function HumanSize($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 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>B</mi><mi>y</mi><mi>t</mi><mi>e</mi><mi>s</mi><mi>a</mi><mi>n</mi><mi>d</mi><mi>d</mi><mi>i</mi><mi>v</mi><mi>i</mi><mi>d</mi><mi>e</mi><mi>s</mi><mi>i</mi><mi>t</mi><mi>b</mi><mi>y</mi><mn>1024</mn><mi>b</mi><mi>y</mi><mi>t</mi><mi>e</mi><mi>s</mi><mi>u</mi><mi>n</mi><mi>t</mi><mi>i</mi><mi>l</mi><mi>l</mi><mi>i</mi><msup><mi>t</mi><mo mathvariant="normal" lspace="0em" rspace="0em">′</mo></msup><mi>s</mi><mi>n</mi><mi>o</mi><mi>l</mi><mi>o</mi><mi>n</mi><mi>g</mi><mi>e</mi><mi>r</mi><mi>o</mi><mi>v</mi><mi>e</mi><mi>r</mi><mi>o</mi><mi>r</mi><mi>e</mi><mi>q</mi><mi>u</mi><mi>a</mi><mi>l</mi><mi>t</mi><mi>o</mi><mn>1024</mn><mo separator="true">,</mo><mi>m</mi><mi>e</mi><mi>a</mi><mi>n</mi><mi>w</mi><mi>h</mi><mi>i</mi><mi>l</mi><mi>e</mi><mi>i</mi><mi>t</mi><mi>i</mi><mi>n</mi><mi>c</mi><mi>r</mi><mi>e</mi><mi>a</mi><mi>s</mi><mi>e</mi><mi>s</mi><mi>t</mi><mi>h</mi><mi>e</mi></mrow><annotation encoding="application/x-tex">Bytes and divides it by 1024 bytes untill it's no longer over or equal to 1024, meanwhile it increases the </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.9463em;vertical-align:-0.1944em;"></span><span class="mord mathnormal" style="margin-right:0.05017em;">B</span><span class="mord mathnormal" style="margin-right:0.03588em;">y</span><span class="mord mathnormal">t</span><span class="mord mathnormal">es</span><span class="mord mathnormal">an</span><span class="mord mathnormal">dd</span><span class="mord mathnormal">i</span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">i</span><span class="mord mathnormal">d</span><span class="mord mathnormal">es</span><span class="mord mathnormal">i</span><span class="mord mathnormal">t</span><span class="mord mathnormal">b</span><span class="mord mathnormal" style="margin-right:0.03588em;">y</span><span class="mord">1024</span><span class="mord mathnormal">b</span><span class="mord mathnormal" style="margin-right:0.03588em;">y</span><span class="mord mathnormal">t</span><span class="mord mathnormal">es</span><span class="mord mathnormal">u</span><span class="mord mathnormal">n</span><span class="mord mathnormal">t</span><span class="mord mathnormal">i</span><span class="mord mathnormal" style="margin-right:0.01968em;">ll</span><span class="mord mathnormal">i</span><span class="mord"><span class="mord mathnormal">t</span><span class="msupsub"><span class="vlist-t"><span class="vlist-r"><span class="vlist" style="height:0.7519em;"><span style="top:-3.063em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight"><span class="mord mtight">′</span></span></span></span></span></span></span></span></span><span class="mord mathnormal">s</span><span class="mord mathnormal">n</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal">n</span><span class="mord mathnormal" style="margin-right:0.03588em;">g</span><span class="mord mathnormal">ero</span><span class="mord mathnormal" style="margin-right:0.03588em;">v</span><span class="mord mathnormal">erore</span><span class="mord mathnormal" style="margin-right:0.03588em;">q</span><span class="mord mathnormal">u</span><span class="mord mathnormal">a</span><span class="mord mathnormal">lt</span><span class="mord mathnormal">o</span><span class="mord">1024</span><span class="mpunct">,</span><span class="mspace" style="margin-right:0.1667em;"></span><span class="mord mathnormal">m</span><span class="mord mathnormal">e</span><span class="mord mathnormal">an</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mord mathnormal">hi</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">e</span><span class="mord mathnormal">i</span><span class="mord mathnormal">t</span><span class="mord mathnormal">in</span><span class="mord mathnormal">cre</span><span class="mord mathnormal">a</span><span class="mord mathnormal">ses</span><span class="mord mathnormal">t</span><span class="mord mathnormal">h</span><span class="mord mathnormal">e</span></span></span></span>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.