Undefined variable: site

File: /mnt/pc-www/dod/manage/siteFunctions.inc.php (130) Error 8

126	if(isset($u['host']))
127		$site = $u['host'];
128	$url = str_replace('.webp', '.jpg', $url);
129	switch($site){
130		case 'a.vimeocdn.com': case 'secure-a.vimeocdn.com':
131		case 'b.vimeocdn.com': case 'secure-b.vimeocdn.com':
132		case 'c.vimeocdn.com': case 'secure-c.vimeocdn.com':
133		case 'd.vimeocdn.com': case 'secure-d.vimeocdn.com':
134			$size = '_' . $size . '.jpg';
135			$url = str_replace(array('_100.jpg','_295.jpg'), array($size, $size), $url);