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Calculate (convert) File Size

/ Published in: PHP
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This function converts file size in bytes to the larger units.
You can add bigger values like exa-, zetta-, yotta- bytes.

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  1. function calculateSize($size, $sep = ' ')
  2. {
  3. 	$unit = null;
  4. 	$units = array('B', 'KB', 'MB', 'GB', 'TB');
  5.  
  6. 	for($i = 0, $c = count($units); $i < $c; $i++)
  7. 	{
  8. 		if ($size > 1024)
  9. 		{
  10. 			$size = $size / 1024;
  11. 		}
  12. 		else
  13. 		{
  14. 			$unit = $units[$i];
  15. 			break;
  16. 		}
  17. 	}
  18.  
  19. 	return round($size, 2).$sep.$unit;
  20. }
  21. echo calculateSize(32942443); // Result: 31.42 MB
  22. echo calculateSize(2298543567223, ''); // Result: 2.09TB

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