preg_replace and regular expressions.

Okay, so what I have is a BB code type of thing for a CMS, which I for obvious reasons can't allow HTML. Here's the snippet of my function: ******** function bbCode($str) { $db = new _Mysql; $strOld = $str; $strNew = $str; $getRegexs = $db->query("SELECT regex,replace,search FROM _bb_codes"); while ($getRegex = mysql_fetch_assoc($getRegexs)) {

    $search = base64_decode($getRegex['search']);
    $regex = base64_decode($getRegex['regex']);
    $replace = base64_decode($getRegex['replace']);
    if (preg_match($search,$strNew) == 1)
     {
      for ($i = 1; $i < 20; $i++)
       {
        $strNew = $strOld;

$strNew = preg_replace($regex,$replace,$strNew);

        if ($strNew == $strOld)
         {
          break;
         }
        else
         {
          $strOld = $strNew;
         }
       }
     }

} $return = $strNew; return $return; } ********** But, for something like this: [quote][quote]Quote #2[/quote]Quote #1[/quote]No quote. I'll get: <div class="quoteContainer"> [quote]Quote #2[/quote]Quote #1</div> No quote. Despite being in the loop. Regex is: /\[quote\]((.*|\n)*)\[\/quote\]/ Replace is: <div class="messageQuote">$1</div> Both are stored base64 encoded in a database. Any help / suggestions much appreciated.