function extra registro

function cs_wc_extra_register_fields() {
    ?>
<p class="form-row form-row-first">
        <label for="reg_billing_first_name"><?php _e( 'Nome', 'textdomain' ); ?> <span class="required">*</span></label>
        <input type="text" class="input-text" name="billing_first_name" id="reg_billing_first_name" value="<?php if ( ! empty( $_POST['billing_first_name'] ) ) esc_attr_e( $_POST['billing_first_name'] ); ?>" />
    </p>
    <p class="form-row form-row-last">
        <label for="reg_billing_last_name"><?php _e( 'Sobrenome', 'textdomain' ); ?> <span class="required">*</span></label>
        <input type="text" class="input-text" name="billing_last_name" id="reg_billing_last_name" value="<?php if ( ! empty( $_POST['billing_last_name'] ) ) esc_attr_e( $_POST['billing_last_name'] ); ?>" />
    </p>
<p class="form-row form-row-wide">
        <label for="billing_company"><?php _e( 'Razão Social', 'textdomain' ); ?> <span class="required">*</span></label>
        <input type="text" class="input-text" name="billing_company" id="billing_company" value="<?php if ( ! empty( $_POST['billing_company'] ) ) esc_attr_e( $_POST['billing_company'] ); ?>" />
    </p>

    <p class="form-row form-row-first">
        <label for="billing_cnpj"><?php _e( 'CNPJ', 'textdomain' ); ?> <span class="required">*</span></label>
        <input type="text" class="input-text cnpj" name="billing_cnpj" id="billing_cnpj" value="<?php if ( ! empty( $_POST['billing_cnpj'] ) ) esc_attr_e( $_POST['billing_cnpj'] ); ?>" />
    </p>
    <p class="form-row form-row-last">
        <label for="reg_billing_ie"><?php _e( 'Inscrição Estadual', 'textdomain' ); ?> <span class="required">*</span></label>
        <input type="text" class="input-text ie" name="billing_ie" id="billing_ie" value="<?php if ( ! empty( $_POST['billing_ie'] ) ) esc_attr_e( $_POST['billing_ie'] ); ?>" />



    <?php
}
add_action( 'woocommerce_register_form_start', 'cs_wc_extra_register_fields' );
/**
 * Validate the extra register fields.
 *
 * @param  string $username          Current username.
 * @param  string $email             Current email.
 * @param  object $validation_errors WP_Error object.
 *
 * @return void
 */
function cs_wc_validate_extra_register_fields( $username, $email, $validation_errors ) {
    if ( isset( $_POST['billing_first_name'] ) && empty( $_POST['billing_first_name'] ) ) {
        $validation_errors->add( 'billing_first_name_error', __( '<strong>Erro</strong>: Digite o seu nome.', 'textdomain' ) );
    }
    if ( isset( $_POST['billing_last_name'] ) && empty( $_POST['billing_last_name'] ) ) {
        $validation_errors->add( 'billing_last_name_error', __( '<strong>Erro</strong>: Digite o seu sobrenome.', 'textdomain' ) );
    }
    if ( isset( $_POST['billing_company'] ) && empty( $_POST['billing_company'] ) ) {
        $validation_errors->add( 'billing_company', __( '<strong>Erro</strong>: Digite a Razão Social da sua empresa.', 'textdomain' ) );
    }
    if ( isset( $_POST['billing_cnpj'] ) && empty( $_POST['billing_cnpj'] ) ) {
        $validation_errors->add( 'billing_cnpj', __( '<strong>Erro</strong>: Digite o seu CNPJ.', 'textdomain' ) );
    }
    if ( isset( $_POST['billing_ie'] ) && empty( $_POST['billing_ie'] ) ) {
        $validation_errors->add( 'billing_ie', __( '<strong>Erro</strong>: Digite o seu Inscrição Estadual.', 'textdomain' ) );
    }
}
add_action( 'woocommerce_register_post', 'cs_wc_validate_extra_register_fields', 10, 3 );
/**
 * Save the extra register fields.
 *
 * @param  int  $customer_id Current customer ID.
 *
 * @return void
 */


function cs_wc_save_extra_register_fields( $customer_id ) {
    if ( isset( $_POST['billing_first_name'] ) ) {
        // WordPress default first name field.
        update_user_meta( $customer_id, 'first_name', sanitize_text_field( $_POST['billing_first_name'] ) );
        // WooCommerce billing first name.
        update_user_meta( $customer_id, 'billing_first_name', sanitize_text_field( $_POST['billing_first_name'] ) );
    }

    if ( isset( $_POST['billing_last_name'] ) ) {
        // WordPress default last name field.
        update_user_meta( $customer_id, 'last_name', sanitize_text_field( $_POST['billing_last_name'] ) );
        // WooCommerce billing last name.
        update_user_meta( $customer_id, 'billing_last_name', sanitize_text_field( $_POST['billing_last_name'] ) );
    }
        if ( isset( $_POST['billing_company'] ) ) {
        // WordPress default first cnpj field.
        update_user_meta( $customer_id, 'billing_company', sanitize_text_field( $_POST['billing_company'] ) );
        // WooCommerce billing cnpj name.
        update_user_meta( $customer_id, 'billing_company', sanitize_text_field( $_POST['billing_company'] ) );
    }
    if ( isset( $_POST['billing_cnpj'] ) ) {
        // WordPress default first cnpj field.
        update_user_meta( $customer_id, 'billing_cnpj', sanitize_text_field( $_POST['billing_cnpj'] ) );
        // WooCommerce billing cnpj name.
        update_user_meta( $customer_id, 'billing_cnpj', sanitize_text_field( $_POST['billing_cnpj'] ) );
    }
        if ( isset( $_POST['billing_ie'] ) ) {
        // WordPress default first inscrição estadual field.
        update_user_meta( $customer_id, 'billing_ie', sanitize_text_field( $_POST['billing_ie'] ) );
        // WooCommerce billing inscrição estadual name.
        update_user_meta( $customer_id, 'billing_ie', sanitize_text_field( $_POST['billing_ie'] ) );
    }
}
add_action( 'woocommerce_created_customer', 'cs_wc_save_extra_register_fields' );