WooCommerce Custom Select Field On Registration Form

/**
 * Snippet Name:	WooCommerce Custom Select Field On Registration Form
 * Snippet Author:	ecommercehints.com
 */

// Create the new select drop down list field
add_action( 'woocommerce_register_form', 'ecommercehints_register_select_form_field' );
function ecommercehints_register_select_form_field() {
	woocommerce_form_field(
		'preferred_holiday_destination',
		array(
			'type'		=> 'select',
			'required'	=> true, // Shows an asterisk if true (*)
			'label'		=> 'Preferred Holiday Destination',
			'options'	=> array(
				''			=> 'Please select...',
				'London'	=> 'London', //
				'Ibiza'		=> 'Ibiza'
			)
		),
		( isset($_POST['preferred_holiday_destination']) ? $_POST['preferred_holiday_destination'] : '' )
	);
}

// Show an error if select field is not filled out when registering
add_action( 'woocommerce_register_post', 'ecommercehints_validate_select_field', 10, 3 );
function ecommercehints_validate_select_field( $username, $email, $errors ) {
	if ( empty( $_POST['preferred_holiday_destination'] ) ) {
		$errors->add( 'preferred_holiday_destination_error', 'We need to store this information to send you the right offers!' );
	}
}

// Save the select field as User Meta
add_action( 'woocommerce_created_customer', 'ecommercehints_save_select_field' );
function ecommercehints_save_select_field( $customer_id ){
	if ( isset( $_POST['preferred_holiday_destination'] ) ) {
		update_user_meta( $customer_id, 'preferred_holiday_destination', wc_clean( $_POST['preferred_holiday_destination'] ) );
	}
}

// Show select field in the User Editor
add_action('show_user_profile', 'custom_user_profile_fields');
add_action('edit_user_profile', 'custom_user_profile_fields');

function custom_user_profile_fields( $user ) { ?>
<h2>Custom user meta fields</h2>
    <table class="form-table">
        <tr>
            <th>
                <label for="preferred_holiday_destination"><?php _e( 'Destination' ); ?></label>
            </th>
            <td>
                <input type="text" name="preferred_holiday_destination" id="preferred_holiday_destination" value="<?php echo esc_attr( get_the_author_meta( 'preferred_holiday_destination', $user->ID ) ); ?>" class="regular-text" />
            </td>
        </tr>
    </table>
<?php
}

// Save new select if edited by admin
add_action( 'personal_options_update', 'update_extra_profile_fields' );
add_action( 'edit_user_profile_update', 'update_extra_profile_fields' );
function update_extra_profile_fields( $user_id ) {
    if ( current_user_can( 'edit_user', $user_id ) )
		update_user_meta( $customer_id, 'preferred_holiday_destination', wc_clean( $_POST['preferred_holiday_destination'] ) );
}