PHP and c sharp format the code for the file size respectively

 
function format($size) 
{ 
$sizetext = array(" B", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB"); 
return round($size/pow(1024,($i=floor(log($size,1024)))),2).$sizetext[$i]; 
} 

 
public string formatSize(long size) 
{ 
if (size == 0) return "0"; 
string[] sizetext = new string[] { " B", " KB", " MB", " GB", " TB", " PB" }; 
int i = (int)Math.Floor(Math.Log(size, 1024)); 
return Math.Round(size / Math.Pow(1024, i), 2).ToString() + sizetext[i]; 
}