title: php multi byte strings regex
body: <p>We have a regex to strip out non alpha numeric characters except for '#', '&amp;' and '-'. Here is what it looks like:</p>
  
  <pre><code>preg_replace('/[^a-zA-Z0-9#&amp;-*]/', '', strtolower($title));
  </code></pre>
  
  <p>Now we need to support traditional Chinese strings and the above function won't work. How can I implement similar functionality for traditional Chinese.</p>
  
  <p>Thanks,</p>