title: Comment a PHP line containing # / character
body: <p>How do I comment out the below line of PHP code  </p>
  
  <pre><code>$html = preg_replace('#(&lt;br */?&gt;\s*)+#i', '&lt;br /&gt;', $html);
  </code></pre>
  
  <p>Although the line can be disabled by something like </p>
  
  <pre><code>if (0==1)
      $html = preg_replace('#(&lt;br */?&gt;\s*)+#i', '&lt;br /&gt;', $html);
  </code></pre>
  
  <p>But still this is not a comment. </p>