function SelectLetter() { $where = "1=1"; $param = array(); if (isset($_REQUEST["LetterID"])) { $where .= " AND LetterID=:lid"; $param[":lid"] = $_REQUEST["LetterID"]; } $list = OFC_letters::GetAll($where, $param); echo dataReader::getJsonData($list, count($list), $_GET['callback']); die; }