regex column name from mysql error message
<p>I would like to regex out second '' from the following error message:</p>

<p><code>Duplicate entry 'this_can_be_anything' for key 'I_want_to_grab_this'</code></p>

<p>I'm working with php, but have really vague idea of how regular expressions work. Or maybe I should use something else instead of regex? any directions? ty.</p>
