PHP - how to make MySQL insert query with PDO?

<?php

​

    if(isset($_GET['name']) && isset($_GET['role']))

    {

        $name = $_GET['name'];

        $role = $_GET['role'];

​

        $db_name = 'test';

        $db_host = '127.0.0.1'; // 'localhost'

        $db_username = 'root';

        $db_password = 'root';

​

        $dsn = 'mysql:dbname=' . $db_name . ';host=' . $db_host . ';charset=utf8';

        $pdo = new PDO($dsn, $db_username, $db_password);

​

        $query = 'INSERT INTO `users` (`name`, `role`) VALUES (:name, :role)';

        $statement = $pdo->prepare($query);

​

        if($statement === FALSE)

            die('Query preparation error!');

​

        $parameters = array(

            'name' => $name,

            'role' => $role

        );

​

        if($statement->execute($parameters))

        {

            $count = $statement->rowCount();

​

            if($count > 0)

            {

                $id = $pdo->lastInsertId('id');

                echo 'Last added user has id ' . $id . '.';

            }

            else

                echo 'Add user operation error!';

        }

        else

            echo 'Query execution error!';

    }

​

?>

http://localhost/add-user.php?name=Matt&role=moderator

CREATE TABLE `users` (

    `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,

    `name` VARCHAR(100) NOT NULL,

    `role` VARCHAR(15) NOT NULL,

    PRIMARY KEY (`id`)

)

ENGINE=InnoDB;

INSERT INTO `users`

    (`name`, `role`)

VALUES

    ('John', 'admin'),

    ('Chris', 'moderator'),

    ('Kate', 'user'),

    ('Denis', 'moderator');