Click here to Skip to main content
Click here to Skip to main content

Tagged as

A simple class in PHP to calculate the size of file

, 5 Feb 2013 CPOL
Rate this:
Please Sign up or sign in to vote.
A simple class in PHP to calculate the weight of file


It's a very useful source written in PHP to calculate file size. Two ways have been implemented here:

  1. by Unit Type (e.g.: B, KB, MB, ....)
  2. by precision (e.g.: digits after decimal)

Source Files

  1. class.file_management.php - the main class file
  2. index.php - homepage
  3. test.test - file used as an example only  

Using the code

Class declaration is as follows:

$objZF    =    new FileManagement;

Now call the function as follows:

echo $objZF->file_size_option("test.test", "KB");

In the above way, you can get your result in your desired unit, bytes, kilobytes, megabytes, whatever you want. And the below example is of an auto-fixed unit system, the function will decide the return type of unit. But here you can set the precision, i.e., the number of digits after the decimal.

echo $objZF->file_size_auto("test.test", 2);

The complete class definition is listed here:

class FileManagement
    public $units    =    array('B', 'KB', 'MB', 'GB', 'TB');

    function file_size_auto($fileName, $precision) {
        $bytes    =    filesize($fileName);
        $bytes    =    max($bytes, 0);
        $pow    =    floor(($bytes ? log($bytes) : 0) / log(1024));
        $pow     =    min($pow, count($this->units) - 1);
        $bytes /= pow(1024, $pow);
        $retValue = round($bytes, $precision) . ' ' . $this->units[$pow];
        return $retValue;
    function file_size_option($fileName, $unitType) {
        switch($unitType) {
            case $this->units[0]: 
                $fileSize = number_format((filesize(trim($fileName))), 1) ; 
            case $this->units[1]: 
                $fileSize = number_format((filesize(trim($fileName))/1024), 1) ; 
            case $this->units[2]: 
                $fileSize = number_format((filesize(trim($fileName))/1024/1024), 1) ; 
            case $this->units[3]: 
                $fileSize = number_format((filesize(trim($fileName))/1024/1024/1024), 1) ; 
            case $this->units[4]: 
                $fileSize = number_format((filesize(trim($fileName))/1024/1024/1024/1024), 1) ; 
        $retValue = $fileSize. ' ' .$unitType;
        return $retValue;


Initial post: 13th January, 2013


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Zamshed Farhan
Web Developer
Bangladesh Bangladesh
No Biography provided

Comments and Discussions

QuestionMissing source zip PinstaffSmitha Vijayan5-Feb-13 7:38 
GeneralMy vote of 5 Pingroupikaaes13-Jan-13 11:19 
GeneralRe: My vote of 5 PinmemberSMZF8013-Jan-13 15:38 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.141022.2 | Last Updated 5 Feb 2013
Article Copyright 2013 by Zamshed Farhan
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid