File::size() 

\nn\t3::File()->size($src = NULL); 

Returns the file size of a file in bytes If file does not exist, 0 is returned.

\nn\t3::File()->size('fileadmin/image.jpg');

| @return integer

public function size($src = null)
{
	$src = $this->exists($src);
	if (!$src) return 0;
	return filesize($src);
}