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A simple class in PHP to calculate the size of file

, 5 Feb 2013
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A simple class in PHP to calculate the weight of file

Introduction 

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:

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

License

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

About the Author


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 

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