Next ID number in primary key

[joon1]

select * from test

The SQL above produces the below.

(1) Tom
(2) Jane

I have the code below.

declare(strict_types=1);
error_reporting(-1);
ini_set(‘display_errors’, ‘1’);

$dbConnect=mysqli_connect(‘localhost’, ‘root’, ‘********’, ‘testDB’);

$sql=("INSERT INTO test (name) VALUES (‘Jack’) ");
$sqlt=mysqli_query($dbConnect, $sql);

select * from test

The code above produces the below.

(id) name

(1) Tom
(2) Jane
(0) Jack

(id) is primary key.
my target result is the following.

(1) Tom
(2) Jane
(3) Jack

Why the (id) of Jack is (0) instead of (3)?
How can I get my target result above?

[rpkamp]

You should have marked the column AUTO INCREMENT when you created the table.

Or modify it now to make it AUTO INCREMENT.