Retrieving the last insert id from MySql using PHP

Question

I have two tables in MySql database, one is sales_order and the other is sales_order_details which contains the details of the order in the s

Answer 1

 1. Database

    CREATE TABLE MyGuests (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    firstname VARCHAR(30) NOT NULL,
    lastname VARCHAR(30) NOT NULL,
    email VARCHAR(50),
    reg_date TIMESTAMP
    )


-------------------------------------------------------------------
  1.   Example (MySQLi Object-oriented)

-------------------------------------------------------------------
    connect_error) {
        die("Connection failed: " . $conn->connect_error);
    }

    $sql = "INSERT INTO MyGuests (firstname, lastname, email)
    VALUES ('John', 'Doe', 'john@example.com')";

    if ($conn->query($sql) === TRUE) {
        $last_id = $conn->insert_id;
        echo "New record created successfully. Last inserted ID is: " . $last_id;
    } else {
        echo "Error: " . $sql . "
" . $conn->error;
    }

    $conn->close();
    ?>

------------------------------------------------------------------- 
   2.  Example (MySQLi Procedural)

-------------------------------------------------------------------
    " . mysqli_error($conn);
    }

    mysqli_close($conn);
    ?>

------------------------------------------------------------------- 
  3.  Example (PDO)

-------------------------------------------------------------------
    setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $sql = "INSERT INTO MyGuests (firstname, lastname, email)
        VALUES ('John', 'Doe', 'john@example.com')";
        // use exec() because no results are returned
        $conn->exec($sql);
        $last_id = $conn->lastInsertId();
        echo "New record created successfully. Last inserted ID is: " . $last_id;
        }
    catch(PDOException $e)
        {
        echo $sql . "
" . $e->getMessage();
        }

    $conn = null;
    ?>