title: Regex testers return results but not my site
body: <p>I have used two testers of regex, <a href="http://www.pagecolumn.com/tool/pregtest.htm" rel="nofollow">http://www.pagecolumn.com/tool/pregtest.htm</a> and <a href="http://www.spaweditor.com/scripts/regex/" rel="nofollow">http://www.spaweditor.com/scripts/regex/</a> both return the results I want but when ever I go 'Live' I get no results.</p>
  
  <p>Heres the script I'm trying to get working:</p>
  
  <pre><code>$ptn = "/\\x(..)/";
  $str = "\x47\x4c\x4f\x42\x41\x4c\x53";
  preg_match_all($ptn, $str, $matches, PREG_PATTERN_ORDER);
  print_r($matches);
  </code></pre>
  
  <p>Anyone know where I'm going wrong?</p>