As should be obvious it is a pretty modest WooCommerce form, however, we can add more fields to this structure by utilizing the following actions. Presently, to include extra fields like first name, last name and phone number, and so on, include the following lines of code toward the end of your functions.php, which is located in your theme folder. To do it, add this code at the end of functions.php

/**
* Get additional account fields.
*
* @return array
*/
function iconic_get_account_fields() {
return apply_filters( ‘iconic_account_fields’, array(
‘first_name’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘First Name’, ‘iconic’ ),
‘hide_in_account’ => true,
‘hide_in_admin’ => true,
‘hide_in_checkout’ => true,
‘hide_in_registration’ => false,
‘required’ => true,
),
‘last_name’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘Last Name’, ‘iconic’ ),
‘hide_in_account’ => true,
‘hide_in_admin’ => true,
‘hide_in_checkout’ => true,
‘hide_in_registration’ => false,
‘required’ => true,
),
‘iconic-register-company’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘Company Name’, ‘iconic’ ),
‘placeholder’ => __( ‘E.G: Restore IT’, ‘iconic’ ),
‘required’ => true,
),
‘iconic-register-company-no’ => array(
‘type’ => ‘number’,
‘label’ => __( ‘Company Number’, ‘iconic’ ),
‘placeholder’ => __( ‘E.G:(XXXXXX-YYYY)’, ‘iconic’ ),
‘required’ => true,
),
‘iconic-register-vat-no’ => array(
‘type’ => ‘number’,
‘label’ => __( ‘Vat Number’, ‘iconic’ ),
‘placeholder’ => __( ‘E.G:(XX1234567890)’, ‘iconic’ ),
‘required’ => true,
),
‘iconic-register-phone’ => array(
‘type’ => ‘number’,
‘label’ => __( ‘Cell Phone Number’, ‘iconic’ ),
‘placeholder’ => __( ‘E.G:(+46 (0) 40-43 44 44)’, ‘iconic’ ),
‘required’ => true,
),
‘iconic-register-street’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘Street’, ‘iconic’ ),
),
‘iconic-register-post’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘Post’, ‘iconic’ ),
),
‘iconic-register-city’ => array(
‘type’ => ‘text’,
‘label’ => __( ‘City’, ‘iconic’ ),
),
‘iconic-register-country’ => array(
‘type’ => ‘country’,
‘label’ => __( ‘Country Field’, ‘iconic’ ),
),
) );
}

/**
* Add post values to account fields if set.
*
* @param array $fields
*
* @return array
*/
function iconic_add_post_data_to_account_fields( $fields ) {
if ( empty( $_POST ) ) {
return $fields;
}

foreach ( $fields as $key => $field_args ) {
if ( empty( $_POST[ $key ] ) ) {
$fields[ $key ][‘value’] = ”;
continue;
}

$fields[ $key ][‘value’] = $_POST[ $key ];
}

return $fields;
}

add_filter( ‘iconic_account_fields’, ‘iconic_add_post_data_to_account_fields’, 10, 1 );

/**
* Add fields to registration form and account area.
*/
function iconic_print_user_frontend_fields() {
$fields = iconic_get_account_fields();
$is_user_logged_in = is_user_logged_in();

foreach ( $fields as $key => $field_args ) {
$value = null;

if ( ! iconic_is_field_visible( $field_args ) ) {
continue;
}

if ( $is_user_logged_in ) {
$user_id = iconic_get_edit_user_id();
$value = iconic_get_userdata( $user_id, $key );
}

$value = isset( $field_args[‘value’] ) ? $field_args[‘value’] : $value;

woocommerce_form_field( $key, $field_args, $value );
}
}

add_action( ‘woocommerce_register_form’, ‘iconic_print_user_frontend_fields’, 10 ); // register form
add_action( ‘woocommerce_edit_account_form’, ‘iconic_print_user_frontend_fields’, 10 ); // my account

/**
* Get user data.
*
* @param $user_id
* @param $key
*
* @return mixed|string
*/
function iconic_get_userdata( $user_id, $key ) {
if ( ! iconic_is_userdata( $key ) ) {
return get_user_meta( $user_id, $key, true );
}

$userdata = get_userdata( $user_id );

if ( ! $userdata || ! isset( $userdata->{$key} ) ) {
return ”;
}

return $userdata->{$key};
}

/**
* Get currently editing user ID (frontend account/edit profile/edit other user).
*
* @return int
*/
function iconic_get_edit_user_id() {
return isset( $_GET[‘user_id’] ) ? (int) $_GET[‘user_id’] : get_current_user_id();
}

/**
* Save registration fields.
*
* @param int $customer_id
*/
function iconic_save_account_fields( $customer_id ) {
$fields = iconic_get_account_fields();
$sanitized_data = array();

foreach ( $fields as $key => $field_args ) {
if ( ! iconic_is_field_visible( $field_args ) ) {
continue;
}

$sanitize = isset( $field_args[‘sanitize’] ) ? $field_args[‘sanitize’] : ‘wc_clean’;
$value = isset( $_POST[ $key ] ) ? call_user_func( $sanitize, $_POST[ $key ] ) : ”;

if ( iconic_is_userdata( $key ) ) {
$sanitized_data[ $key ] = $value;
continue;
}

update_user_meta( $customer_id, $key, $value );
}

if ( ! empty( $sanitized_data ) ) {
$sanitized_data[‘ID’] = $customer_id;
wp_update_user( $sanitized_data );
}
}

add_action( ‘woocommerce_created_customer’, ‘iconic_save_account_fields’ ); // register/checkout
add_action( ‘personal_options_update’, ‘iconic_save_account_fields’ ); // edit own account admin
add_action( ‘edit_user_profile_update’, ‘iconic_save_account_fields’ ); // edit other account
add_action( ‘woocommerce_save_account_details’, ‘iconic_save_account_fields’ ); // edit WC account

/**
* Is this field core user data.
*
* @param $key
*
* @return bool
*/
function iconic_is_userdata( $key ) {
$userdata = array(
‘user_pass’,
‘user_login’,
‘user_nicename’,
‘user_url’,
‘user_email’,
‘display_name’,
‘nickname’,
‘first_name’,
‘last_name’,
‘description’,
‘rich_editing’,
‘user_registered’,
‘role’,
‘jabber’,
‘aim’,
‘yim’,
‘show_admin_bar_front’,
);

return in_array( $key, $userdata );
}

/**
* Is field visible.
*
* @param $field_args
*
* @return bool
*/
function iconic_is_field_visible( $field_args ) {
$visible = true;
$action = filter_input( INPUT_POST, ‘action’ );

if ( is_admin() && ! empty( $field_args[‘hide_in_admin’] ) ) {
$visible = false;
} elseif ( ( is_account_page() || $action === ‘save_account_details’ ) && is_user_logged_in() && ! empty( $field_args[‘hide_in_account’] ) ) {
$visible = false;
} elseif ( ( is_account_page() || $action === ‘save_account_details’ ) && ! is_user_logged_in() && ! empty( $field_args[‘hide_in_registration’] ) ) {
$visible = false;
} elseif ( is_checkout() && ! empty( $field_args[‘hide_in_checkout’] ) ) {
$visible = false;
}

return $visible;
}

/**
* Add fields to admin area.
*/
function iconic_print_user_admin_fields() {
$fields = iconic_get_account_fields();
?>
<h2><?php _e( ‘Additional Information’, ‘iconic’ ); ?></h2>
<table class=”form-table” id=”iconic-additional-information”>
<tbody>
<?php foreach ( $fields as $key => $field_args ) { ?>
<?php
if ( ! iconic_is_field_visible( $field_args ) ) {
continue;
}

$user_id = iconic_get_edit_user_id();
$value = iconic_get_userdata( $user_id, $key );
?>
<tr>
<th>
<label for=”<?php echo $key; ?>”><?php echo $field_args[‘label’]; ?></label>
</th>
<td>
<?php $field_args[‘label’] = false; ?>
<?php woocommerce_form_field( $key, $field_args, $value ); ?>
</td>
</tr>
<?php } ?>
</tbody>
</table>
<?php
}

add_action( ‘show_user_profile’, ‘iconic_print_user_admin_fields’, 30 ); // admin: edit profile
add_action( ‘edit_user_profile’, ‘iconic_print_user_admin_fields’, 30 ); // admin: edit other users

/**
* Validate fields on frontend.
*
* @param WP_Error $errors
*
* @return WP_Error
*/
function iconic_validate_user_frontend_fields( $errors ) {
$fields = iconic_get_account_fields();

foreach ( $fields as $key => $field_args ) {
if ( empty( $field_args[‘required’] ) ) {
continue;
}

if ( ! isset( $_POST[‘register’] ) && ! empty( $field_args[‘hide_in_account’] ) ) {
continue;
}

if ( isset( $_POST[‘register’] ) && ! empty( $field_args[‘hide_in_registration’] ) ) {
continue;
}

if ( empty( $_POST[ $key ] ) ) {
$message = sprintf( __( ‘%s is a required field.’, ‘iconic’ ), ‘<strong>’ . $field_args[‘label’] . ‘</strong>’ );
$errors->add( $key, $message );
}
}

return $errors;
}

add_filter( ‘woocommerce_registration_errors’, ‘iconic_validate_user_frontend_fields’, 10 );
add_filter( ‘woocommerce_save_account_details_errors’, ‘iconic_validate_user_frontend_fields’, 10 );

/**
* Show fields at checkout.
*/
function iconic_checkout_fields( $checkout_fields ) {
$fields = iconic_get_account_fields();

foreach ( $fields as $key => $field_args ) {
if ( ! iconic_is_field_visible( $field_args ) ) {
continue;
}

// Make sure our fields have a default priority so
// no error is thrown when sorting them.
$field_args[‘priority’] = isset( $field_args[‘priority’] ) ? $field_args[‘priority’] : 0;

$checkout_fields[‘account’][ $key ] = $field_args;
}

// Default password field has no priority which throws an
// error when it tries to order the fields by priority.
if ( ! empty( $checkout_fields[‘account’][‘account_password’] ) && ! isset( $checkout_fields[‘account’][‘account_password’][‘priority’] ) ) {
$checkout_fields[‘account’][‘account_password’][‘priority’] = 0;
}

return $checkout_fields;
}

add_filter( ‘woocommerce_checkout_fields’, ‘iconic_checkout_fields’, 10, 1 );