[WordPress] Programmatically Creating WordPress Users

00-user-information.php

<?php

$user_info = array(
  'email'      => 'meghan@emaildomain.com',
  'first_name' => 'Meghan',
  'last_name'  => 'McFarlin',
);

01-user-already-exists.php

<?php

// Read the email address - if it's - invalid or the user exists, then return.
$email = $user_info['email'];
if ( ! filter_var( $email, FILTER_VALIDATE_EMAIL ) || username_exists( $email ) ) {
  return;
}

02-setting-a-password.php

<?php

$password = wp_generate_password( 16, false );

03-creating-the-user.php

<?php

// Grab the email and create a password.
$email    = $user_info['email'];
$password = wp_generate_password( 12, false );

// Create the user and set her role.
$user_id = wp_create_user( $email, $password, $email );

// Set the user's role (and remove the previous role).
$user = new \WP_User( $user_id );
$user->set_role( 'author' );