PHP obtains the folder size calculation file

? PhpfunctiongetDirSize ($ dir) {$ handle = opendir ($ dir); while (false! ==( $ FolderOrFile = readdir ($ handle) {if ($ FolderOrFile! =. $ FolderOrFile! =...) {If (I

Function getDirSize ($ dir)
{
$ Handle = opendir ($ dir );
While (false! ==( $ FolderOrFile = readdir ($ handle )))
{
If ($ FolderOrFile! = "." & $ FolderOrFile! = "..")
{
If (is_dir ("$ dir/$ FolderOrFile "))
{
$ SizeResult + = getDirSize ("$ dir/$ FolderOrFile ");
}
Else
{
$ SizeResult + = filesize ("$ dir/$ FolderOrFile ");
}
}
}
Closedir ($ handle );
Return $ sizeResult;
}

// Automatic unit conversion function
Function getRealSize ($ size)
{
$ Kb = 1024; // Kilobyte
$ Mb = 1024 * $ kb; // Megabyte
$ Gb = 1024 * $ mb; // Gigabyte
$ Tb = 1024 * $ gb; // Terabyte

If ($ size <$ kb)
{
Return $ size. "B ";
}
Else if ($ size <$ mb)
{
Return round ($ size/$ kb, 2). "KB ";
}
Else if ($ size <$ gb)
{
Return round ($ size/$ mb, 2). "MB ";
}
Else if ($ size <$ tb)
{
Return round ($ size/$ gb, 2). "GB ";
}
Else
{
Return round ($ size/$ tb, 2). "TB ";
}
}

Echo getRealSize (getDirSize (dirname ($ _ SERVER ['script _ filename']). '/include /'));

?>

######################################## #################

// Function dirsize ($ dir)
//{
// $ Handle = opendir ($ dir );
// $ Size = 0;
// While ($ file = readdir ($ handle ))
//{
// If ($ file = ".") | ($ file = "..") continue;
// If (is_dir ("$ dir/$ file "))
// $ Size + = dirsize ("$ dir/$ file ");
// Else
// $ Size + = filesize ("$ dir/$ file ");
//}
// Closedir ($ handle );
// Return $ size;
//}
// $ Big = dirsize (dirname ($ _ SERVER ['script _ filename']). "/");
// Echo $ big;

The result is two digits after the decimal point.

$ Big * 1024 is measured in KB.