title: php strip_tags: allows <br />?
body: <p>How it is possible to allow <code>&lt;br /&gt;</code> in strip_tags() or any way I can get around to it?</p>
  
  <pre><code>&lt;?php
  $text = '&lt;p&gt;Test &lt;br /&gt;paragraph.&lt;/p&gt;&lt;!-- Comment --&gt; &lt;a href="#fragment"&gt;Other text&lt;/a&gt;';
  echo strip_tags($text);
  echo "\n";
  
  // Allow &lt;p&gt;, &lt;a&gt;, &lt;br /&gt;
  echo strip_tags($text, '&lt;p&gt;&lt;a&gt;&lt;br /&gt;');
  echo "\n";
  
  // Allow &lt;br /&gt; only
  echo strip_tags($text, '&lt;br /&gt;');
  ?&gt;
  </code></pre>
  
  <p>result:</p>
  
  <pre><code>Test paragraph. Other text
  &lt;p&gt;Test paragraph.&lt;/p&gt; &lt;a href="#fragment"&gt;Other text&lt;/a&gt;
  Test paragraph. Other text
  </code></pre>
  
  <p>Thanks,
  Lau</p>