做教育网站有什么好处,outstock. wordpress,网络营销推广与策划课后答案,建设网站公司电话号码disk_free_space()(PHP 4 4.1.0, PHP 5, PHP 7)返回目录中的可用空间说明disk_free_space(string$directory):float给出一个包含有一个目录的字符串#xff0c;本函数将根据相应的文件系统或磁盘分区返回可用的字节数。参数$directory文件系统目录或者磁盘分区。Note:如果…disk_free_space()(PHP 4 4.1.0, PHP 5, PHP 7)返回目录中的可用空间说明disk_free_space(string$directory):float给出一个包含有一个目录的字符串本函数将根据相应的文件系统或磁盘分区返回可用的字节数。参数$directory文件系统目录或者磁盘分区。Note:如果指定了文件名而不是文件目录这个函数的行为将并不统一会因操作系统和 PHP 版本而异。返回值以浮点返回可用的字节数或者在失败时返回FALSE。范例Example #1disk_free_space()例子?php // $df 包含根目录下可用的字节数$df disk_free_space(/);//在 Windows 下:$df_c disk_free_space(C:);$df_d disk_free_space(D:);?注释Note:此函数不能作用于远程文件被检查的文件必须是可通过服务器的文件系统访问的。参见Transformation is possible WITHOUT using loops:$bytes disk_free_space(.);$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 . ;echo sprintf(%1.2f, $bytes / pow($base,$class)) . . $si_prefix[$class] . ;?Nice, but please be aware of the prefixes.SI specifies a lower case k as 1000 prefix.It doesnt 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:KBs are calculated decimal; power of 10 (1000 bytes each)KiBs 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$si_prefix array( B, KB, MB, GB, TB, EB, ZB, YB );you are missing the petabyte after terabyteB, KB, MB, GB, TB, EB, ZB, YBshould look likeB, KB, MB, GB, TB, PB, EB, ZB, YBAnother easy way to convert bytes to human readable sizes would be this:function HumanSize($Bytes){$Typearray(, kilo, mega, giga, tera, peta, exa, zetta, yotta);$Index0;while($Bytes1024){$Bytes/1024;$Index;}return(.$Bytes. .$Type[$Index].bytes);}?It simply takes the $Bytes and divides it by 1024 bytes untill its no longer over or equal to 1024, meanwhile it increases the $Index to allocate which suffix belongs to the return (adding bytes to the end to save some space).You can easily modify it so its shorter, but I made it so its more clearer.Nitrogen.Note that disk_free_space() does an open_basedir check.With respect to Linux filesystems, Ill point out that this function returns the space available in the current volume or mountpoint, not the total physical disk space. That is, this function used on the /root volume shows the free space in /root, which is different from /home, and so on.?php function size($size, array $optionsnull) {$o [binary false,decimalPlaces 2,decimalSeparator .,thausandsSeparator ,maxThreshold false, // or thresholds keysufix [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 ($count - 1)))returnnumber_format($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 GBvar_dump(size(disk_free_space(/), [binary true]));// string(9) 13.63 GiBvar_dump(size(disk_free_space(/), [maxThreshold 2]));// string(11) 14631.90 MBvar_dump(size(disk_free_space(/), [binary true, maxThreshold 2]));// string(12) 13954.07 MiB?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 :$path \\\\server\\dir;echo(floor(100 * disk_free_space($disk) / disk_total_space($disk)));?It can also work with drive letters mapped to a network path in certain cases.
