如何在woocommerce注册表中添加文件上传功能？

Question

我尝试了这个但是这段代码只添加了几个我希望添加文件上传功能的输入字段。 如果我更改输入类型文本它显示文件选项，也选择文件，但不上传和获取。 请帮助我谢谢

   

<p class="form-row form-row-first">
  <label for="reg_billing_first_name">
    <?php _e( 'First name', 'woocommerce' ); ?>
    <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( 'Last name', 'woocommerce' ); ?>
    <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>
<div class="clear"></div>
<p class="form-row form-row-wide">
  <label for="reg_billing_phone">
    <?php _e( 'Phone', 'woocommerce' ); ?>
    <span class="required">*</span></label>
  <input type="text" class="input-text" name="billing_phone" id="reg_billing_phone" value="<?php if ( ! empty( $_POST['billing_phone'] ) ) esc_attr_e( $_POST['billing_phone'] ); ?>" />
</p>
<?php
}
add_action( 'woocommerce_register_form_start', 'wooc_extra_register_fields' );
function wooc_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>Error</strong>: First name is required!', 'woocommerce' ) );
    }

    if ( isset( $_POST['billing_last_name'] ) && empty( $_POST['billing_last_name'] ) ) {
        $validation_errors->add( 'billing_last_name_error', __( '<strong>Error</strong>: Last name is required!.', 'woocommerce' ) );
    }


    if ( isset( $_POST['billing_phone'] ) && empty( $_POST['billing_phone'] ) ) {
        $validation_errors->add( 'billing_phone_error', __( '<strong>Error</strong>: Phone is required!.', 'woocommerce' ) );
    }
}
add_action( 'woocommerce_register_post', 'wooc_validate_extra_register_fields', 10, 3 );

function wooc_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_phone'] ) ) {
        // WooCommerce billing phone
        update_user_meta( $customer_id, 'billing_phone', sanitize_text_field( $_POST['billing_phone'] ) );
    }
}

add_action( 'woocommerce_created_customer', 'wooc_save_extra_register_fields' );