php preg_replace problem
<pre><code>$strSubject= preg_replace('/\b'.$strWord.'\b/i', '&lt;b&gt;'.$strWord.'&lt;/b&gt;', $strSubject);    
</code></pre>

<p>above code works in php 5.2.6 but not working in php 5.2.9 and get " warning,unknow modifer....." error. please help</p>
