how to replace certain tag from first and last ??

[PHPycho]

Hello forums..
Can anybody give a hint for how to replace the first <ul> and last </ul> tag from the string $string:

$string = '<ul>
  <li></li>
  <li>
    <ul>
      <li>        
      </li>
      <li></li>     
    </ul>
  </li>
  <li></li>
</ul>'; 

Thanks in advance to all of you.

[Ruben K.]

If the string looks like that, just cut off the first and last 4 chars

[logic_earth]

$result = preg_replace('~^<ul>|</ul>$~i', '', $subject); 

[silversk8r]

to replace in this specific string:

echo $newtagopen . substr($string, 4, -5)  . $newtagclose; 

or just use regex for a general case

[kyberfabrikken]

That regex will only work, if there is nothing before or after the ul and if there is only one ul at the top level. If you want it to work generic, you need to write a parser.

[Dean C]

Might want to give PHP's DOM extension a try:
http://uk2.php.net/dom