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

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

  • By
    6 Things You Didn&#8217;t Know About Firefox OS

    Firefox OS is all over the tech news and for good reason:  Mozilla's finally given web developers the platform that they need to create apps the way they've been creating them for years -- with CSS, HTML, and JavaScript.  Firefox OS has been rapidly improving...

Incredible Demos

  • By
    MooTools Window Object Dumping

    Ever want to see all of the information stored within the window property of your browser? Here's your chance. The XHTML We need a wrapper DIV that we'll consider a console. The CSS I like making this look like a command-line console. The MooTools JavaScript Depending on what you have loaded...

  • By
    Using Dotter for Form Submissions

    One of the plugins I'm most proud of is Dotter. Dotter allows you to create the typical "Loading..." text without using animated images. I'm often asked what a sample usage of Dotter would be; form submission create the perfect situation. The following...

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!