如何将自定义单选框添加到WooCommerce帐单页面并通过此字段更改总价？

假设我需要将表单顶部的自定义无线电字段（公司或个人）添加到的帐单中。如果访客检查人员，他们应缴纳21%的税，并且他们选择位于NL的公司，他们也应缴纳21%的税。其他情况下他们应该免税吗？有什么想法吗？

这就是我所尝试的：

add_filter(\'woocommerce_billing_fields\', \'custom_woocommerce_billing_fields\');

函数custom\\u woocommerce\\u billing\\u字段（$字段）{

$fields[\'customer_type\'] = array(
    \'label\' => __(\'Bedrijf\', \'woocommerce\'),
    \'placeholder\' => _x(\'Bedrijf\', \'placeholder\', \'woocommerce\'),
    \'required\' => false,
    \'clear\' => false,
    \'type\' => \'checkbox\',
    \'class\' => array(\'my-css\'),
);

$fields[\'customer_type_personal\'] = array(
    \'label\' => __(\'Persoonlijke\', \'woocommerce\'),
    \'placeholder\' => _x(\'Persoonlijke\', \'placeholder\', \'woocommerce\'),
    \'required\' => false,
    \'clear\' => false,
    \'type\' => \'checkbox\',
    \'class\' => array(\'my-css-2\'),
);

return $fields;

}

add_filter(\'woocommerce_billing_fields\', \'custom_woocommerce_billing_fields\'); function custom_woocommerce_billing_fields($fields) { $fields[\'billing_options\'] = array( \'label\' => __(\'Ordering Method\', \'woocommerce\'), // Add custom field label \'placeholder\' => _x(\'Your NIF here....\', \'placeholder\', \'woocommerce\'), // Add custom field placeholder \'required\' => true, // if field is required or not \'clear\' => false, // add clear or not \'type\' => \'radio\', // add field type \'class\' => array(\'form-group\'), // add class name \'options\' => array( \'privato_cittadino\' => \'Privato cittadino\', \'azienda_professionista\' => \'Azienda o libero professionista\', ), );

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