php - 清理 WooCommerce 中的自定义结帐字段数据

Question

遵循 WooCommerce 结帐字段自定义文档:
Customizing checkout fields using actions and filters

我通过 functions.php 向 woocommerce 结帐页面添加了一个自定义字段。

我担心是否必须清理该自定义字段的用户输入？

我认为它不需要清理，因为它已传递到帐单字段，如:$fields['billing']，对吗？

如果不是，我该如何清理这个自定义字段？

创建此自定义字段旨在接受长度不超过 50 的文本字符串(拉丁文)和整数。

// Hook in
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );

// Our hooked in function - $fields is passed via the filter!
function custom_override_checkout_fields( $fields ) {

//Adding custom text field  
 $fields['billing']['billing_username'] = array(
'type' => 'text',
'label'     => __('Your Username', 'woocommerce'),
'placeholder'   => _x('', 'placeholder', 'woocommerce'),
'required'  => true,
'class'     => array('form-row-first'),
'clear'     => true
 );

 return $fields;
}

Answer 1

如果您查看问题中链接的相关官方文档，您会得到以下片段:

/**
 * Update the order meta with field value
 */
add_action( 'woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta' );

function my_custom_checkout_field_update_order_meta( $order_id ) {
    if ( ! empty( $_POST['my_field_name'] ) ) {
        update_post_meta( $order_id, 'My Field', sanitize_text_field( $_POST['my_field_name'] ) );
    }
}

In your case you don't need that as address fields are already processed by Woocommerce.

For custom special fields: The answer is yes (which is not your case)

As you can see in this code they use sanitize_text_field() WordPress function, when saving the submitted data to database with update_post_meta() function…

This is only for custom checkout fields and not for existing checkout fields, that already get their own process…