buys = null; $std->sells = null; $std->message = array(); $std->error = true; if (isset($OrderClass, $UserClass)) { $buy_list = $OrderClass->get_top_buy_sell_list(TOP_BUYS_TABLE, $asc_desc='DESC'); // buy $sell_list = $OrderClass->get_top_buy_sell_list(TOP_SELL_TABLE, $asc_desc='ASC'); // sell $std->buys = $buy_list; $std->sells = $sell_list; $std->error = false; } echo json_encode($std); } else { return false; }