Smarty File Size Modifier

Here’s a simple Smarty modifier that will format an integer that represents the number of bytes in a file as a human readable string.

Usage:
{$fileSizeInBytes|file_size}

Example:
{assign var=fileSizeInBytes value=10485760}
{$fileSizeInBytes|file_size}

{assign var=fileSizeInBytes value= 768000}
{$fileSizeInBytes|file_size}

{assign var=fileSizeInBytes value=303}
{$fileSizeInBytes|file_size}

Output:
10 MB
750 Kb
303 bytes

<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Smarty file_size modifier plugin
 *
 * Type:     modifier<br>
 * Name:     file_size<br>
 * Purpose:  format file size represented in bytes into a human readable string<br>
 * Input:<br>
 *         - bytes: input bytes integer
 * @author   Rob Ruchte <rob at thirdpartylabs dot com>

 * @param integer
 * @return string
 */
function smarty_modifier_file_size($bytes=0)
{
    $mb = 1024*1024;

    if ($bytes > $mb)
    {
        $output = sprintf ("%01.2f",$bytes/$mb) . " MB";
    }
    elseif ( $bytes >= 1024 )
    {
        $output = sprintf ("%01.0f",$bytes/1024) . " Kb";
    }
    else
    {
        $output = $bytes . " bytes";
    }

    return $output;
}

/* vim: set expandtab: */

?>