blocked sites

[nclemale36]

i get blank white screen when sending a inbox that has a word in from the blocked sites list.

///////////////////////////////////////////Is site blocked

function isblocked($str,$sender)
{
  if(ismod($sender))
  {
    return false;
  }
  $str = str_replace(" ","",$str);
  $str = strtolower($str);
    $res = mysql_query("SELECT site FROM dave_blockedsite");
while ($row = mysql_fetch_array($res)) 
{
   $sites[] = $row[0];
}
  for($i=0;$i<count($sites);$i++)
  {
        $nosf = substr_count($str,$sites[$i]);
    if($nosf>0)
    {
      return true;
    }
  }
  return false;
}

anyone help

[nclemale36]

ignore that code its my inbox coding thats not right .