title: Searching by RegExp (Total Commander / PHP)
body: <p>I'm using Total Commander (file manager), which allows searching file content by regular expressions.</p>
  
  <p>I'd like to search PHP files for deprecated syntax like <code>$_SESSION[user]</code> - so, I need the RegExp for finding all tags, which don't have quotes inside the square brackets.</p>
  
  <p>Any ideas?</p>