PHP SQL Server กับการ Connect Database แค่ครั้งเดียว แล้วใช้กับ Datalist ได้หลายช่องพร้อมกัน

CREATE TABLE `testdata` (
  `testdata` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

INSERT INTO `testdata` (`testdata`) VALUES
(1),
(2),
(3),
(4),
(5),
(6),
(7),
(8),
(9),
(10),
(11),
(12),
(13),
(14),
(15),
(16),
(17),
(18),
(19),
(20),
(21),
(22),
(23),
(24),
(25),
(26),
(27),
(28),
(29),
(30),
(31),
(32),
(33),
(34),
(35),
(36),
(37),
(38),
(39),
(40),
(41),
(42),
(43),
(44),
(45),
(46),
(47),
(48),
(49),
(50),
(51),
(52),
(53),
(54),
(55),
(56),
(57),
(58),
(59),
(60),
(61),
(62),
(63),
(64),
(65),
(66),
(67),
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(69),
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(74),
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(76),
(77),
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(84),
(85),
(86),
(87),
(88),
(89),
(90),
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(92),
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(528),
(529),
(530),
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(533),
(534),
(535),
(536),
(537),
(538),
(539),
(540),
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(542),
(543),
(544),
(545),
(546),
(547),
(548),
(549),
(550),
(551),
(552),
(553),
(554),
(555),
(556),
(557),
(558),
(559),
(560),
(561),
(562),
(563),
(564),
(565),
(566),
(567),
(568),
(569),
(570),
(571),
(572),
(573),
(574),
(575),
(576),
(577),
(578),
(579),
(580),
(581),
(582),
(583),
(584),
(585),
(586),
(587),
(588),
(589),
(590),
(591),
(592),
(593),
(594),
(595),
(596),
(597),
(598),
(599),
(600),
(601),
(602),
(603),
(604),
(605),
(606),
(607),
(608),
(609),
(610),
(611),
(612),
(613),
(614),
(615),
(616),
(617),
(618),
(619),
(620),
(621),
(622),
(623),
(624),
(625),
(626),
(627),
(628),
(629),
(630),
(631),
(632),
(633),
(634),
(635),
(636),
(637),
(638),
(639),
(640),
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(642),
(643),
(644),
(645),
(646),
(647),
(648),
(649),
(650),
(651),
(652),
(653),
(654),
(655),
(656),
(657),
(658),
(659),
(660),
(661),
(662),
(663),
(664),
(665),
(666),
(667),
(668),
(669),
(670),
(671),
(672),
(673),
(674),
(675),
(676),
(677),
(678),
(679),
(680),
(681),
(682),
(683),
(684),
(685),
(686),
(687),
(688),
(689),
(690),
(691),
(692),
(693),
(694),
(695),
(696),
(697),
(698),
(699),
(700),
(701),
(702),
(703),
(704),
(705),
(706),
(707),
(708),
(709),
(710),
(711),
(712),
(713),
(714),
(715),
(716),
(717),
(718),
(719),
(720),
(721),
(722),
(723),
(724),
(725),
(726),
(727),
(728),
(729),
(730),
(731),
(732),
(733),
(734),
(735),
(736),
(737),
(738),
(739),
(740),
(741),
(742),
(743),
(744),
(745),
(746),
(747),
(748),
(749),
(750),
(751),
(752),
(753),
(754),
(755),
(756),
(757),
(758),
(759),
(760),
(761),
(762),
(763),
(764),
(765),
(766),
(767),
(768),
(769),
(770),
(771),
(772),
(773),
(774),
(775),
(776),
(777),
(778),
(779),
(780),
(781),
(782),
(783),
(784),
(785),
(786),
(787),
(788),
(789),
(790),
(791),
(792),
(793),
(794),
(795),
(796),
(797),
(798),
(799),
(800),
(801),
(802),
(803),
(804),
(805),
(806),
(807),
(808),
(809),
(810),
(811),
(812),
(813),
(814),
(815),
(816),
(817),
(818),
(819),
(820),
(821),
(822),
(823),
(824),
(825),
(826),
(827),
(828),
(829),
(830),
(831),
(832),
(833),
(834),
(835),
(836),
(837),
(838),
(839),
(840),
(841),
(842),
(843),
(844),
(845),
(846),
(847),
(848),
(849),
(850),
(851),
(852),
(853),
(854),
(855),
(856),
(857),
(858),
(859),
(860),
(861),
(862),
(863),
(864),
(865),
(866),
(867),
(868),
(869),
(870),
(871),
(872),
(873),
(874),
(875),
(876),
(877),
(878),
(879),
(880),
(881),
(882),
(883),
(884),
(885),
(886),
(887),
(888),
(889),
(890),
(891),
(892),
(893),
(894),
(895),
(896),
(897),
(898),
(899),
(900),
(901),
(902),
(903),
(904),
(905),
(906),
(907),
(908),
(909),
(910),
(911),
(912),
(913),
(914),
(915),
(916),
(917),
(918),
(919),
(920),
(921),
(922),
(923),
(924),
(925),
(926),
(927),
(928),
(929),
(930),
(931),
(932),
(933),
(934),
(935),
(936),
(937),
(938),
(939),
(940),
(941),
(942),
(943),
(944),
(945),
(946),
(947),
(948),
(949),
(950),
(951),
(952),
(953),
(954),
(955),
(956),
(957),
(958),
(959),
(960),
(961),
(962),
(963),
(964),
(965),
(966),
(967),
(968),
(969),
(970),
(971),
(972),
(973),
(974),
(975),
(976),
(977),
(978),
(979),
(980),
(981),
(982),
(983),
(984),
(985),
(986),
(987),
(988),
(989),
(990),
(991),
(992),
(993),
(994),
(995),
(996),
(997),
(998),
(999),
(1000);

<?php
    $dbname = 'mydatabase';
    $dbuser = 'root';
    $dbpass = '';
?>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>

<?php   
	include ("connect.php");

    $db1 = new mysqli('localhost', $dbuser, $dbpass, $dbname);

	mysqli_set_charset($db1, "utf8");

    if (!$db1) {
        exit('Connect Error (' . mysqli_connect_errno() . ') '
             . mysqli_connect_error());
    }
?>

  <form>
    <div class="container">
  <input list="testdata" name="testdata">
  <datalist id="testdata">
    <?php
    $queryusers = "SELECT * FROM `testdata` ";
    $db01 = mysqli_query($db1, $queryusers);
	
	foreach ($db01 as $d1) {
        echo "<option value='".$d1['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata2" name="testdata2">
  <datalist id="testdata2">
          <?php
    $queryusers2 = "SELECT * FROM `testdata` ";
    $db02 = mysqli_query($db1, $queryusers2);

	foreach ($db01 as $d2) {
        echo "<option value='".$d2['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata3" name="testdata3">
  <datalist id="testdata3">
    <?php
    $queryusers3 = "SELECT * FROM `testdata` ";
    $db03 = mysqli_query($db1, $queryusers3);

	foreach ($db01 as $d3) {
        echo "<option value='".$d3['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata4" name="testdata4">
  <datalist id="testdata4">
    <?php
    $queryusers4 = "SELECT * FROM `testdata` ";
    $db04 = mysqli_query($db1, $queryusers4);

	foreach ($db04 as $d4) {
        echo "<option value='".$d4['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata5" name="testdata5">
  <datalist id="testdata5">
    <?php
    $queryusers5 = "SELECT * FROM `testdata` ";
    $db05 = mysqli_query($db1, $queryusers5);

	foreach ($db1 as $d5) {
        echo "<option value='".$d5['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata6" name="testdata6">
  <datalist id="testdata6">
    <?php
    $queryusers6 = "SELECT * FROM `testdata` ";
    $db06 = mysqli_query($db1, $queryusers6);

	foreach ($db06 as $d6) {
        echo "<option value='".$d6['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata7" name="testdata7">
  <datalist id="testdata7">
    <?php
    $queryusers7 = "SELECT * FROM `testdata` ";
    $db07 = mysqli_query($db1, $queryusers7);

	foreach ($db07 as $d7) {
        echo "<option value='".$d7['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata8" name="testdata8">
  <datalist id="testdata8">
    <?php
    $queryusers8 = "SELECT * FROM `testdata` ";
    $db08 = mysqli_query($db1, $queryusers8);

	foreach ($db08 as $d8) {
        echo "<option value='".$d8['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata9" name="testdata9">
  <datalist id="testdata9">
    <?php
    $queryusers9 = "SELECT * FROM `testdata` ";
    $db09 = mysqli_query($db1, $queryusers9);

	foreach ($db09 as $d9) {
        echo "<option value='".$d9['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
  <input list="testdata10" name="testdata10">
  <datalist id="testdata10">
    <?php
    $queryusers10 = "SELECT * FROM `testdata` ";
    $db10 = mysqli_query($db1, $queryusers10);

	foreach ($db10 as $d10) {
        echo "<option value='".$d10['testdata']."'></option>";
    }
    ?>
</datalist><br><br>
    </div>
  </form>

</body>
</html>