Register email in database

Here is an example of how you can register an email in a database:

Database Schema

Let's assume we have a database table called users with the following columns:

• id (primary key, auto-incrementing integer)
• email (unique string)
• password (string)
• created_at (timestamp)
• updated_at (timestamp)

Register Email Function

Here is an example of a function that registers an email in the database:

function registerEmail($email, $password) {
  // Check if the email already exists in the database
  $existingUser = getUserByEmail($email);
  if ($existingUser) {
    return false; // Email already exists
  }

  // Hash the password
  $hashedPassword = password_hash($password, PASSWORD_DEFAULT);

  // Insert the new user into the database
  $query = "INSERT INTO users (email, password, created_at, updated_at) VALUES (:email, :password, NOW(), NOW())";
  $stmt = $db->prepare($query);
  $stmt->execute([':email' => $email, ':password' => $hashedPassword]);

  // Return the ID of the new user
  return $db->lastInsertId();
}

getUserByEmail Function

Here is an example of a function that retrieves a user by email:

function getUserByEmail($email) {
  $query = "SELECT * FROM users WHERE email = :email";
  $stmt = $db->prepare($query);
  $stmt->execute([':email' => $email]);
  $user = $stmt->fetch();
  return $user;
}

Example Usage

Here is an example of how you can use the registerEmail function:

$email = '[email protected]';
$password = 'mysecretpassword';

$userID = registerEmail($email, $password);
if ($userID) {
  echo "User registered successfully!";
} else {
  echo "Email already exists";
}

Note that this is just a basic example and you should consider implementing additional security measures, such as:

• Validating user input
• Using a secure password hashing algorithm
• Implementing email verification
• Storing additional user information (e.g. name, address, etc.)

Also, this example uses a simple NOW() function to set the created_at and updated_at timestamps. You may want to consider using a more robust timestamping mechanism, such as using a separate timestamp column and updating it manually.