Generate Readable Byte Labels Using PHP

By  on  

Whenever you manage disk space, it's infinitely easier to read when when the bytes are displayed in KB, MB, GB... format. When reading files on the disk, the server returns the disk space in bytes so it's on us programmers to program file sizes for display. Using PHP, this task is cake.

function format_bytes($bytes)
{
    $labels = array('B','KB','MB','GB','TB');
    for($x = 0; $bytes >= 1024 && $x < (count($labels) - 1); $bytes /= 1024, $x++);
    return(round($bytes, 2).' '.$labels[$x]);
}

Users will appreciate this!

Recent Features

Incredible Demos

  • By
    MooTools Fun with Fx.Shake

    Adding movement to your website is a great way to attract attention to specific elements that you want users to notice. Of course you could use Flash or an animated GIF to achieve the movement effect but graphics can be difficult to maintain. Enter...

  • By
    Add Controls to the PHP Calendar

    I showed you how to create a PHP calendar last week. The post was very popular so I wanted to follow it up with another post about how you can add controls to the calendar. After all, you don't want your...

Discussion

  1. JP

    I always like using the right-shift operator for this kind of stuff. So instead of:

    $bytes /= 1024

    I would use:

    $bytes >>= 10

    Of course, you lost the digits after the decimal point (unless you get fancy), but on the plus side, it’s way faster than floating point division. The shift operators must be some of the loneliest operators in PHP, don’t you think?

  2. Nice one!
    I did a similar function … somewhat overkill, but a usefull thing over the years =)
    http://openminds.lucido-media.de/human-readable-bytes-sorry-php-net

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!