Size Formatter

FormatHelper.class.php

<?php

class FormatHelper {
    static public function niceSize($bytes, $digits = 2) {
        $format = "%0.{$digits}f %s";
        $sizeObj = self::bytesHumnaized($bytes);
        return sprintf($format, $sizeObj->value, $sizeObj->extension);
    }   
    
    static public function bytesHumanized($bytes, $step = 1024) {
        $out = new stdClass;
        $sizes = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB'];
        $sizeIndex = 0;
        
        while ($bytes >= $step) {
            $sizeIndex ++;
            $bytes /= $step;    
        }
        
        $out->value = $bytes;
        $out->extension = $sizes[$sizeIndex];
        return $out;
    }
}