title: How do I allow brackets in a php preg_match function call?
body: <p>I want to allow brackets in my php preg_match function call:</p>
  
  <pre><code>preg_match("/[^A-Za-z0-9-_,#@. \/']/",$address).
  </code></pre>
  
  <p>How can this be done?</p>