title: regex: remove all text within "double-quotes" (multiline included)
body: <p>I'm having a hard time removing text within double-quotes, especially those spread over multiple lines:</p>
  
  <pre><code>$file=file_get_contents('test.html');
  
  $replaced = preg_replace('/"(\n.)+?"/m','', $file);
  </code></pre>
  
  <p>I want to remove ALL text within double-quotes (included). Some of the text within them will be spread over multiple lines.</p>
  
  <p>I read that newlines can be <code>\r\n</code> and <code>\n</code> as well.</p>