Hello Reader's!, If you are looking for a code that can give the directory size from a given path, Then you can use below library code for both Windows and Linux hosting:-

If on a Windows Host:

<?
    $filePath = 'c:/www/myfolder';
    $obj = new COM ( 'scripting.filesystemobject' );
    if ( is_object ( $obj ) )
    {
        $ref = $obj->getfolder ( $filePath );
        echo 'Directory: ' . $filePath . ' => Size: ' . $ref->size;
        $obj = null;
    }
    else
    {
        echo 'fail to detect';
    }
?>

And if you are using a Linux Host then correct your code as follows:-

<?
    $filePath = './path/var/myfolder';
    $io = popen ( '/usr/bin/du -sk ' . $filePath, 'r' );
    $size = fgets ( $io, 4096);
    $size = substr ( $size, 0, strpos ( $size, "\t" ) );
    pclose ( $io );
    echo 'Directory: ' . $filePath . ' => Size: ' . $size;
?>