要创建用户表并添加数据，可以按照以下步骤进行：

创建数据库连接：

$servername = "localhost";$username = "root";$password = "";$dbname = "myDB";$conn = new mysqli($servername, $username, $password, $dbname);if ($conn->connect_error) {die("Connection failed: " . $conn->connect_error);}

创建用户表：

$sql = "CREATE TABLE users (id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,username VARCHAR(30) NOT NULL,email VARCHAR(50) NOT NULL,password VARCHAR(50) NOT NULL)";if ($conn->query($sql) === TRUE) {echo "Table users created successfully";} else {echo "Error creating table: " . $conn->error;}

添加用户数据：

$username = "JohnDoe";$email = "johndoe@example.com";$password = "password123";$sql = "INSERT INTO users (username, email, password) VALUES ('$username', '$email', '$password')";if ($conn->query($sql) === TRUE) {echo "New record created successfully";} else {echo "Error: " . $sql . "<br>" . $conn->error;}

关闭数据库连接：

$conn->close();

以上是一个简单的示例，你可以根据自己的需求对表结构和数据进行更改。在实际应用中，建议使用预处理语句来防止SQL注入攻击。