MySQL SubQuery

//mysql_subquery 
//copyright 1999 avi bryant, all rights reserved 
//feel free to use this and modify it as you see fit 

function sub($result) 
{  
  if($result == 0) 
  return "()"; 
  else 
  { 
  $row = mysql_fetch_row($result); 
  $strResult = "( $row[0]";  
  while($row = mysql_fetch_row($result)) 
  $strResult = "$strResult , $row[0]"; 

  $strResult = "$strResult )"; 
  return $strResult; 
  } 
} 

function mysql_subquery($query) 
{ 
  $substart = strpos($query, "("); 
  if($substart != false) 
  { 
  $subend = strrpos($query, ")"); 
  $before = substr($query, 0, $substart); 
  $after = substr($query, $subend+1, -1); 
  $subquery = substr($query, $substart+1, $subend-$substart-1); 
   
  $subresult = mysql_subquery($subquery); 
  $subtext = sub($subresult); 
  return mysql_query($before . $subtext . $after); 
  } 
  else return mysql_query($query); 
}