formatting file sizes

[Anon]

I've been going through the manual looking for a function that will take the result of filesize() or any other filesystem function that returns a number of bytes and return it in a more legible format (like 750KB or 3.78MB, etc...). This would sort of be like a date() function (which translates epoch seconds) but for bytes instead. Is there such a function? If not there should be. I realize that I can write a function that will divide by 1024 and round it off but it seems like there should be a built in function for such a common task.

[Anon]

Well, no, there isn't a built-in function (it certainly wouldn't be used as much as date()). It would make more sense to have a "metric()" function, to format SI units.

// $fsize is an integer, indicating the size of a file in bytes.
$suffix='B';
if($fsize>1024)
{ $suffix='kB';
$fsize/=1024.;
}
if($fsize>1024)
{ $suffix='MB';
$fsize/=1024.;
}
if($fsize>1024)
{ $suffix='GB';
$fsize/=1024.;
}
if($fsize>1024)
{ $suffix='TB';
$fsize/=1024.;
}
$fsize=round($fsize,2);
$fstring=$fsize.$suffix;