(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
disk_free_space — Returns available space on filesystem or disk partition
Given a string containing a directory, this function will return the number of bytes available on the corresponding filesystem or disk partition.
directoryA directory of the filesystem or disk partition.
Зауваження:
Given a file name instead of a directory, the behaviour of the function is unspecified and may differ between operating systems and PHP versions.
Returns the number of available bytes as a float
або false в разі помилки.
Приклад #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:");
?>Зауваження: Ця функція незастосовна для роботи з віддаленими файлами, оскільки файл повинен бути доступним через файлову систему сервера.
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 />';
?>$si_prefix = array( 'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB' );
you are missing the petabyte after terabyte
'B', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB'
should look like
'B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'Nice, but please be aware of the prefixes.
SI specifies a lower case 'k' as 1'000 prefix.
It doesn't make sense to use an upper case 'K' as binary prefix,
while the decimal Mega (M and following) prefixes in SI are uppercase.
Furthermore, there are REAL binary prefixes since a few years.
Do it the (newest and recommended) "IEC" way:
KB's are calculated decimal; power of 10 (1000 bytes each)
KiB's are calculated binary; power of 2 (1024 bytes each).
The same goes for MB, MiB and so on...
Feel free to read:
http://en.wikipedia.org/wiki/Binary_prefixAnother easy way to convert bytes to human readable sizes would be this:
<?php
function HumanSize($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.