Introduction
It's a very useful source written in PHP to calculate file size. Two ways have been implemented here:
- by Unit Type (e.g.: B, KB, MB, ....)
- by precision (e.g.: digits after decimal)
Source Files
- class.file_management.php - the main class file
- index.php - homepage
- test.test - file used as an example only
Using the code
Class declaration is as follows:
include("class.file_management.php");
$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) ;
break;
case $this->units[1]:
$fileSize = number_format((filesize(trim($fileName))/1024), 1) ;
break;
case $this->units[2]:
$fileSize = number_format((filesize(trim($fileName))/1024/1024), 1) ;
break;
case $this->units[3]:
$fileSize = number_format((filesize(trim($fileName))/1024/1024/1024), 1) ;
break;
case $this->units[4]:
$fileSize = number_format((filesize(trim($fileName))/1024/1024/1024/1024), 1) ;
break;
}
$retValue = $fileSize. ' ' .$unitType;
return $retValue;
}
}
History
Initial post: 13th January, 2013
I have received B.Sc. degree in Computer Science and Engineering from Khulna University of Engineering and Technology, (KUET) Bangladesh in 2003 and Master of Business Administration in Management from University of Dhaka, Bangladesh in 2009. I started my IT career as a Software Engineer at BDCOM Online Limited, then worked for BRAC BDMail Network Limited (bracNet). At present, I am working with Application Development, Integration and Maintenance department of the International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B) - an international health research organization located in Dhaka, Bangladesh, dedicated to saving lives through research and treatment.