Cara memasukan data ke database

Form

$no = 1; $tampil = mysqli_query($conn,"SELECT * FROM modal,pendapatan WHERE pendapatan.id=modal.id");

while ($d = mysqli_fetch_array($tampil)) { ?>

proses

$h = $_POST['']; $t = $_POST['']; $unt = $_POST[''];

$tamb = mysqli_query($conn,"INSERT INTO hasil_total(hari,tanggal,htotal) VALUES('$h','$t','$unt')");

if ($conn->query($tamb)) { echo "Berhasil"; } else { echo "Gagal"; }

mau ngambil data dari $h, $t, $unt gimana ya? tolong dibantu...