Comments on: PHP File Last Modified and Filesize (bytes to KB/MB)

By: Pete west

Pete west — Sat, 22 Oct 2011 11:48:29 +0000

I actually found another code as well, this one autodetects which file size to use (KB/MB/GB)

function calc($size) {
$kb=1024;
$mb=1048576;
$gb=1073741824;
$tb=1099511627776;
if(!$size)
return ’0 B’;
elseif($size<$kb)
return $size.' B';
elseif($size<$mb)
return round($size/$kb, 2).' KB';
elseif($size<$gb)
return round($size/$mb, 2).' MB';
elseif($size<$tb)
return round($size/$gb, 2).' GB';
else
return round($size/$tb, 2).' TB';
}

All I need to know is how to make it work (how do I make that code display a files size?)

By: Pete west

Pete west — Sat, 22 Oct 2011 06:25:20 +0000

This is great, exactly what I have been looking for.
With Erick Levy’s code, I’m quite new with PHP, do I have to make a seperate functions.php file with that code in it? How does it exactly work?

By: john

john — Tue, 28 Jun 2011 17:28:20 +0000

thanks for letting me know – it’s been fixed

By: peter

peter — Sun, 26 Jun 2011 20:44:48 +0000

Actually there is a typo in the code. In the round function the variable should be $filesize and not $file.
So the correct code should be:

$file_kb = round(($filesize / 1024), 2); // bytes to KB ...

By: Erick Levy

Erick Levy — Wed, 22 Jun 2011 02:04:48 +0000

How about using a function to return the filesize in the desired units or automatic mode:


function file_size($file,$unit='auto') {
	$retval = false;
	if (file($file)) {
		$filesize = filesize($file);
		if ($unit == 'GB' || $unit == 'auto' && $filesize >= pow(1024,3)) {
			$retval = round(($filesize / pow(1024,3)),2) . 'GB';
		} elseif ($unit = 'MB' || $unit == 'auto' && $filesize >= pow(1024,2)) {
			$retval = round(($filesize / pow(1024,2)),2) . 'MB';
		} elseif ($unit = 'KB' || $unit == 'auto' && $filesize >= 1024) {
			$retval = round(($filesize / 1024),2) . 'KB';
		} else {
			$retval = $filesize . 'Bytes';
		}
	}
	return $retval;
}

By: telo

telo — Sun, 27 Feb 2011 03:33:19 +0000

thanks for the code. really usefull

By: Abeon

Abeon — Mon, 05 Apr 2010 13:01:12 +0000

A very simple and effective solution, thanks for sharing it!

By: laptop satÄ±ÅŸ

laptop satÄ±ÅŸ — Mon, 20 Oct 2008 12:19:28 +0000

Ä± like this blog . . .

By: john

john — Sun, 02 Mar 2008 13:56:14 +0000

Glad it could help. Thanks for the correction – it’s been fixed.

By: Eric

Eric — Sun, 02 Mar 2008 02:34:34 +0000

Exactly what I was looking for. Just change the comment for the second line to “// bytes to MB” instead of KB. It’s a little misleading.