$html = '<table>
	<tr>
		<td>asdf</td>
	</tr>
</table>


<table>
	<tr>
		<td>zxcv</td>
	</tr>
</table>';


preg_match_all("/(<table[^>]*>).+?zxcv.+?<\/table>/s", $html, $matches, PREG_SET_ORDER);

var_dump($matches);
exit;

// RESULTS:

array
  0 => 
    array
      0 => '<table>
	<tr>
		<td>asdf</td>
	</tr>
</table>


<table>
	<tr>
		<td>zxcv</td>
	</tr>
</table>' (length=93)
      1 => '<table>' (length=7)




*****
how can i get just the second table?