Insert Code
$tid = $_POST['tid'];
$hi = $_POST['hi'];


// please remove last ' , (coma)' from fileds

mysqli_query($conn,"INSERT INTO `hu` ( `tid`,`hi`, ) VALUES ('$tid','$hi',)");
Select Single
$getdata = mysqli_query($conn,"SELECT * FROM hu ");
$row = mysqli_fetch_array($getdata);
$tid = $row['tid'];
$hi = $row['hi'];
Select While
$getdata = mysqli_query($conn,"SELECT * FROM hu ");
while($row = mysqli_fetch_array($getdata)) {
$tid = $row['tid'];
$hi = $row['hi'];
}
Delete Code
$getid = $_GET['id'];
mysqli_query($conn,"DELETE FROM hu WHERE tid ='$id' ");
Update Single Code
$tid = $_POST['tid'];
$hi = $_POST['hi'];

mysqli_query($conn,"UPDATE `hu` SET `tid` = '$tid' WHERE `hu`.`tid` = 1")
mysqli_query($conn,"UPDATE `hu` SET `hi` = '$hi' WHERE `hu`.`tid` = 1")