配送国に基づいて、Woocommerceチェックアウト電話フィールドをオプションにします

Woocommerceのチェックアウトでは、特定の配送国で電話フィールドが不要になるようにしています。基づいて"https://stackoverflow.com/questions/47431299/make-checkout-phone-field-optional-for-specific-countries-in-woocommerce/47435682#47435682「正常に機能する回答コード。請求国ではなく配送国でこのコードが機能するように、いくつかの変更を加えようとしました。

何度も試したが、どうやって動かすのかわからなかった。

どんな助けでも素晴らしく、大いに感謝されます。

次のコードは、特定の「配送」国にのみ請求電話フィールドを必須にします。

Woocommerceバージョン3.4以降では、Woocommerceフォームフィールドの状況が少し変更されたため、必要に応じて追加の関数とコードが追加されました。

また、コードを拡張して、[マイアカウント]> [住所の編集]の電話フィールドの動作を処理します。この場合、顧客は自分のアカウントデータを変更できます。

これが完全なコードです（最初の関数で国コードを定義してください）：

// SETTINGS: The countries codes (2 capital letters) in the array
function defined_countries_for_phone_field(){
    return array( 'UK', 'BE', 'GE', 'IT', 'ES' );
}

// Remove "(optional)" from non required "Billing phone" field
add_filter( 'woocommerce_form_field' , 'remove_checkout_optional_fields_label', 10, 4 );
function remove_checkout_optional_fields_label( $field, $key, $args, $value ) {

    // Get the defined countries codes
    $countries = defined_countries_for_phone_field(); // Get Customer shipping country $shipping_country = WC()->customer->get_shipping_country();

    // Only on checkout page and My account > Edit address for billing phone field
    if( 'billing_phone' === $key && ( ( is_wc_endpoint_url( 'edit-address' ) && ! in_array($shipping_country, $countries) ) || is_checkout() ) ) { $optional = '&nbsp;<span class="optional">(' . esc_html__( 'optional', 'woocommerce' ) . ')</span>';
        $field = str_replace( $optional, '', $field ); } return $field;
}

// Make the billing phone field optional (by default)
add_filter( 'woocommerce_billing_fields', 'filter_billing_phone_field', 10, 1 );
function filter_billing_phone_field( $fields ) { // Get the defined countries codes $countries = defined_countries_for_phone_field();

    // Get Customer shipping country
    $shipping_country = WC()->customer->get_shipping_country(); // Only on checkout page and My account > Edit address if ( ( is_wc_endpoint_url( 'edit-address' ) && ! in_array($shipping_country, $countries) ) || is_checkout() ) $fields['billing_phone']['required'] = false;

    return $fields; } // Real time shipping country selection actions add_action( 'woocommerce_after_order_notes', 'custom_checkout_scripts_and_fields', 10, 1 ); function custom_checkout_scripts_and_fields( $checkout ) {
    $required = esc_attr__( 'required', 'woocommerce' ); // Get the defined countries codes $countries = defined_countries_for_phone_field();

    // Hidden field for the phone number validation
    echo '<input type="hidden"  name="billing_phone_check" id="billing_phone_check" value="0">';
    $countries_str = "'".implode( "', '", $countries )."'"; // Formatting countries for jQuery
    ?>
    <script type="text/javascript">
        (function($){ var required = '<abbr class="required" title="<?php echo $required; ?>">*</abbr>',
                countries = [<?php echo $countries_str; ?>], location = $('#shipping_country option:selected').val(),
                phoneCheck = 'input#billing_phone_check',
                phoneField = '#billing_phone_field';

            function actionRequire( actionToDo='yes', selector='' ){
                if ( actionToDo == 'yes' ) {
                    $(selector).addClass("validate-required"); $(selector+' label').append(required);
                } else {
                    $(selector).removeClass("validate-required"); $(selector+' label > .required').remove();
                }
                $(selector).removeClass("woocommerce-validated"); $(selector).removeClass("woocommerce-invalid woocommerce-invalid-required-field");
            }

            // Default value Once DOM is loaded (with a 300 ms delay)
            setTimeout( function(){
                actionRequire( 'no', phoneField );
                if( $.inArray( location, countries ) >= 0 && $(phoneCheck).val() == '0' ){
                    actionRequire( 'yes',phoneField );
                    $(phoneCheck).val('1'); } }, 300 ); // Live value $( 'form.checkout' ).on( 'change', '#shipping_country', function(){
                var location = $('#shipping_country option:selected').val(); if ( $.inArray( location, countries ) >= 0 && $(phoneCheck).val() == 0 ) { actionRequire( 'yes' ,phoneField ); $(phoneCheck).val('1');
                } else if ( $(phoneCheck).val() == 1 ) { actionRequire( 'no' ,phoneField ); $(phoneCheck).val('0');
                }
            });
       })(jQuery);
        </script>
    <?php
}

// Phone number validation, when the field is required
add_action('woocommerce_checkout_process', 'billing_phone_field_process');
function billing_phone_field_process() {
    // Check if set, if its not set add an error.
    if ( ! $_POST['billing_phone'] && $_POST['billing_phone_check'] == '1' )
        wc_add_notice( __( 'Please enter a number phone.' ), 'error' );
}

コードは、アクティブな子テーマ（またはアクティブなテーマ）のfunction.phpファイルに入ります。テスト済みで、バージョン3.4以降のWooCommerceで動作します。

関連：

• https://stackoverflow.com/questions/47431299/make-checkout-phone-field-optional-for-specific-countries-in-woocommerce/47435682#47435682
• https://stackoverflow.com/questions/50769727/remove-optional-text-from-checkout-fields-in-woocommerce-3-4/50773934#50773934

元の回答を提供してくれた@LoicTheAztecに大いに感謝しますが、このソリューションでは結果が不安定になり、電話フィールドが必須状態とオプション状態（オン/オフ）の間で交互に切り替わります。

元の回答では、請求先住所のみを使用していて、別の配送先住所または配送先住所を入力していない顧客も考慮されていません。

2019年の以下の更新バージョンをご覧ください

// SETTINGS: The countries codes (2 capital letters) in the array
function defined_countries_for_phone_field(){
    return array( 'GB', 'JE', 'GG', 'IM' );
}

// Remove "(optional)" from non required "Billing phone" field
add_filter( 'woocommerce_form_field' , 'remove_checkout_optional_fields_label', 10, 4 );
function remove_checkout_optional_fields_label( $field, $key, $args, $value ) {

    // Get the defined countries codes
    $countries = defined_countries_for_phone_field(); // Get Customer shipping country $shipping_country = WC()->customer->get_shipping_country();

    // Only on checkout page and My account > Edit address for billing phone field
    if( 'billing_phone' === $key && ( ( is_wc_endpoint_url( 'edit-address' ) && in_array($shipping_country, $countries) ) || is_checkout() ) ) { $optional = '&nbsp;<span class="optional">(' . esc_html__( 'optional', 'woocommerce' ) . ')</span>';
        $field = str_replace( $optional, '', $field ); } return $field;
}

// Make the billing phone field optional (by default)
add_filter( 'woocommerce_billing_fields', 'filter_billing_phone_field', 10, 1 );
function filter_billing_phone_field( $fields ) { // Get the defined countries codes $countries = defined_countries_for_phone_field();

    // Get Customer shipping country
    $shipping_country = WC()->customer->get_shipping_country(); // Only on checkout page and My account > Edit address if ( ( is_wc_endpoint_url( 'edit-address' ) && in_array($shipping_country, $countries) ) || is_checkout() ) $fields['billing_phone']['required'] = false;

    return $fields; } // Real time shipping country selection actions add_action( 'woocommerce_after_order_notes', 'custom_checkout_scripts_and_fields', 10, 1 ); function custom_checkout_scripts_and_fields( $checkout ) {
    $required = esc_attr__( 'required', 'woocommerce' ); // Get the defined countries codes $countries = defined_countries_for_phone_field();

    // Hidden field for the phone number validation
    echo '<input type="hidden"  name="billing_phone_check" id="billing_phone_check" value="0">';
    $countries_str = "'".implode( "', '", $countries )."'"; // Formatting countries for jQuery
    ?>
    <script type="text/javascript">
        (function($){ var required = '<abbr class="required" title="<?php echo $required; ?>">*</abbr>';
            var countries = [<?php echo $countries_str; ?>]; if($('.shipping_address').is(':visible')) {
                    // ship to different country selected
                    var selectedcountry = $('#shipping_country option:selected').val(); } else { var selectedcountry = $('#billing_country option:selected').val();
                }
             //var selectedcountry = $('#shipping_country option:selected').val(); var phoneCheck = 'input#billing_phone_check'; var phoneField = '#billing_phone_field'; function actionRequire( actionToDo='yes', selector='' ){ if ( actionToDo == 'yes' ) { $(selector).addClass("validate-required");
                    $(selector+' label > .required').remove(); $(selector+' label').append(required);
                } else {
                    $(selector).removeClass("validate-required"); $(selector+' label > .required').remove();
                }
                $(selector).removeClass("woocommerce-validated"); $(selector).removeClass("woocommerce-invalid woocommerce-invalid-required-field");
            }

            // Default value Once DOM is loaded (with a 300 ms delay)
            setTimeout( function(){
                if($('.shipping_address').is(':visible')) { // ship to different country selected var selectedcountry = $('#shipping_country option:selected').val();
                } else {
                    var selectedcountry = $('#billing_country option:selected').val(); } actionRequire( 'no', phoneField ); if( $.inArray( selectedcountry, countries ) == -1){
                    actionRequire( 'yes',phoneField );
                    $(phoneCheck).val('1'); } }, 300 ); // Live value $( 'form.checkout' ).on( 'change', '#billing_country, #shipping_country, #ship-to-different-address-checkbox', function(){
                setTimeout( function(){
                    if($('.shipping_address').is(':visible')) { // ship to different country selected var selectedcountry = $('#shipping_country option:selected').val();
                    } else {
                        var selectedcountry = $('#billing_country option:selected').val(); } if ( $.inArray( selectedcountry, countries ) == -1) {
                        actionRequire( 'yes' ,phoneField );
                        $(phoneCheck).val('1'); } else { actionRequire( 'no' ,phoneField ); $(phoneCheck).val('0');
                    }
                }, 300 );
            });
       })(jQuery);
        </script>
    <?php
}

// Phone number validation, when the field is required
add_action('woocommerce_checkout_process', 'billing_phone_field_process');
function billing_phone_field_process() {
    // Check if set, if its not set add an error.
    if ( ! $_POST['billing_phone'] && $_POST['billing_phone_check'] == '1' )
        wc_add_notice( __( 'Please enter a number phone.' ), 'error' );
}