Radio button and check-box values saved aginast different Ids - php

Question

i am trying to get radio button and check box values against the same id but both values are stored in two different ids.
Where is problem?
Help me
$sql1 ="INSERT INTO student (name,fathername)
VALUES ('$name','$fathername')";
$sql2 = "SELECT last_insert_id() as id";
$res1 = mysqli_query($conn, $sql1); //here you insert
$res2 = mysqli_query($conn, $sql2); //here you fetch the ID you inserted
$id = mysqli_fetch_array($res2)['id'];
$sql3 = "INSERT INTO information (user_id,email)
VALUES ('$id','$email')"; //here you use that said ID in your second query
$res3 = mysqli_query($conn, $sql3); //aaand you insert
Now the problem starts from here, both values are stored against different ids.
//For insertion multiple values of checkbox
$sql6="INSERT INTO information (checkbox) VALUES ('" . $checkBox . "')";
$res6 = mysqli_query($conn, $sql6);
//For insertion radio button value
$sql7 ="INSERT INTO information (radio) VALUES ('" . $gender . "')";
$res7 = mysqli_query($conn, $sql7);
if i tried to insert values like this ('$id','" . $checkBox . "') and ('$id','" . $gender . "'), it returns null values in database.

Answer 1

If you run multiple INSERT query it will insert with different ids. No need to use INSERT multiple queries for a single row.
Solution:
$query = "INSERT INTO information (user_id,email,check box,radio)
VALUES ($id,'$email','$checkbox','$gender')";
mysqli_query($conn,$query);
UPDATE:
You also have an issue to getting last INSERT id. You can not fetch record as:
$id = mysqli_fetch_array($res2)['id'];
You can also get last insert Id by using PHP as:
$res1 = mysqli_query($conn, $sql1);
$id = mysqli_insert_id($conn); // use after ist query.
Your Modified Code:
$sql1 ="INSERT INTO student (name,fathername) VALUES ('$name','$fathername')";
$res1 = mysqli_query($conn, $sql1);
$id = mysqli_insert_id($conn); // will return last insert id
$query = "INSERT INTO information (user_id,email,check box,radio) VALUES ($id,'$email','$checkbox','$gender')";
mysqli_query($conn,$query);