title: Any preg_match to check if a url is a youtube/vimeo/dailymotion video link?
body: <p>What's the best preg_match syntax to check if a url is a video link of youtube/vimeo/ or  dailymotion?</p>
  
  <p>maybe if it's hard, then just to check the domain name.</p>
  
  <p>Thanks</p>