Wordpress - add users

wp-add-users

/*----------------------------
    wordpress function to add
    users to database programatically
-----------------------------*/
function fb_wp_insert_user() {
    $user_data = array(
    'ID' => '',
    'user_pass' => wp_generate_password(),
    'user_login' => 'dummy',
    'user_nicename' => 'Dummy',
    'user_url' => '',
    'user_email' => 'dummy@example.com',
    'display_name' => 'Dummy',
    'nickname' => 'dummy',
    'first_name' => 'Dummy',
    'user_registered' => '2010-05-15 05:55:55',
    'role' => get_option('default_role') // Use default role or another role, e.g. 'editor'
    );
    $user_id = wp_insert_user( $user_data );
}

add_action( 'admin_init', 'fb_wp_insert_user' );