Woocommerce 预订中每人和每件商品的动态结账自定义字段

对于预订网站，我正在尝试创建一个功能，可以根据人数添加与会者列表。感谢 LoicTheAztec，我已经获得了单次预订的代码。那部分工作正常。

我还需要相同的功能来进行多次预订。我怎样才能实现这个目标？

这是代码：

//* Add a new checkout field
add_filter( 'woocommerce_checkout_fields', 'ppp_filter_checkout_fields' );
function ppp_filter_checkout_fields($fields){
    $fields['extra_fields'] = array(
    'participant_details' => array(
        'type' => 'participant_details',
        'required'      => false,
        'label' => __( 'Participant Details' )
        ),
    );

    // Add a "persons" hidden input field
    foreach( WC()->cart->get_cart() as $cart_item ) {
        $persons = $cart_item['booking']['_persons'][0];
    }
    echo '<input type="hidden" name="persons" value="' . $persons . '">';

    return $fields;
}

//* Add the field to the checkout
add_filter( 'woocommerce_form_field_participant_details', 'ppp_filter_checkout_field_group', 10, 4 );
function ppp_filter_checkout_field_group( $field, $key, $args, $value ){
    $op_cart_count = WC()->cart->get_cart_contents_count();

    $items = WC()->cart->get_cart();

    foreach($items as $item) {
        $person = $item['booking']['_persons'][0];
    }

    if ($person > 1) {

        $html = '';

        $html .= "<h3>Deelnemers</h3>";

        for ( $i = 1; $i < $person; $i++) {
            $counter = $i + 1;

            $html .= "Deelnemer ". $counter . "<br>";

            $html .= woocommerce_form_field( "participant_details[$i][full_name]", array(
                "type" => "text",
                "return" => true,
                "value" => "",
                "required"      => true,
                "label" => __( "Naam" )
                )
            );
            $html .= woocommerce_form_field( "participant_details[$i][email_address]", array(
                "type" => "email",
                "return" => true,
                "value" => "",
                "required"      => true,
                "label" => __( "Emailadres" )
                )
            );

        }
        return $html;
    }
}

//* display the extra field on the checkout form
add_action( 'woocommerce_checkout_after_customer_details' ,'ppp_extra_checkout_fields' );
function ppp_extra_checkout_fields(){

    $checkout = WC()->checkout();

    foreach ( $checkout->checkout_fields['extra_fields'] as $key => $field ) :

        woocommerce_form_field( $key, $field, $checkout->get_value( $key ) );

    endforeach;
}

//* Validate custom checkout fields
add_action( 'woocommerce_after_checkout_validation', 'ppp_checkout_field_participant_details_validation', 20, 2 );
function ppp_checkout_field_participant_details_validation( $data, $errors ){
    if ( isset( $_POST['persons'] ) && $_POST['persons'] > 1 ){

        for ( $i = 1, $j = 2; $i < esc_attr( $_POST['persons'] ); $i++, $j++ ) {
            if ( empty( $_POST['participant_details'][$i]['full_name'] ) )
                $errors->add( 'participant_'.$i.'_full_name',  __( "Please fill in the participant $j full name" ), 'error' );

            if ( empty( $_POST['participant_details'][$i]['email_address'] ) )
                $errors->add( 'participant_'.$i.'_email_address',  __( "Please fill in the participant $j email address" ), 'error' );
        }
    }
}


//* Sanitize our custom field
function ppp_custom_process_checkout_field_participant_details( $posted ){

    $clean = array();

    foreach( $posted as $participant ){
        $details = ppp_custom_checkout_clean_participant_details( $participant );

        if( ! empty( $details ) ){
            $clean[] = $details;
        }
    }

    return $clean;
}
add_filter( 'woocommerce_process_checkout_participant_details_field', 'ppp_custom_process_checkout_field_participant_details' );

//*
function ppp_custom_checkout_clean_participant_details( $participant = array() ){
    $details = array();
    if( isset( $participant["full_name"] ) ){
        $details['full_name'] = sanitize_text_field( $participant["full_name"] );
    }
    if( isset( $participant["email_address"] ) ){
        $details['email_address'] = sanitize_text_field( $participant["email_address"] );
    }
    return $details;
}


//* Update_post_meta
add_action( 'woocommerce_checkout_update_order_meta', 'ppp_custom_checkout_field_update_order_meta', 10, 2 );
function ppp_custom_checkout_field_update_order_meta( $order_id, $posted ){

    if( ! empty( $posted["participant_details"] ) ){
        update_post_meta( $order_id, "_participant_details", $posted["participant_details"] );
    } else {
        delete_post_meta( $order_id, "_participant_details" );
    }

}
add_action( 'woocommerce_checkout_update_order_meta', 'ppp_custom_checkout_field_update_order_meta', 10, 2 );

您错过了一个额外的循环（购物车项目循环）……我已经完全重新审视了您的代码，使其适用于多个项目（不同的项目）。

因此，这些字段现在由项目和每个项目上的人员动态生成：

// Conditional function: Check if at least there is more than one person in cart items
function ppp_check_persons(){
    $enabled    = array();

    foreach( WC()->cart->get_cart() as $cart_item) {
        if( isset($cart_item['booking']['_persons'][0])
        && $cart_item['booking']['_persons'][0] > 1 )
        {
            $enabled = true;
            break;
        }
    }
    return $enabled;
}

// Add a new checkout field
add_filter( 'woocommerce_checkout_fields', 'ppp_filter_checkout_fields' );
function ppp_filter_checkout_fields($fields){

    $fields['extra_fields'] = array( 'participant' => array(
        'type' => 'participant',
        'required'      => false,
        'label' => __( 'Participant Details' )
    ) );

    $cart_items = WC()->cart->get_cart();
    $count      = 1;

    echo '<input type="hidden" name="items_count" value="' . sizeof($cart_items) . '">';

    if( ! ppp_check_persons() ) return $fields; // Exit (not enough persons)

    // Add "persons" hidden input fields for each cart_item
    foreach( WC()->cart->get_cart() as $cart_item ) {
        $persons = $cart_item['booking']['_persons'][0];
        echo '<input type="hidden" name="persons_'.$count.'" value="' . $persons . '">';
        $count++;
    }

    return $fields;
}

// Add the field to the checkout
add_filter( 'woocommerce_form_field_participant', 'ppp_filter_checkout_field_group', 10, 4 );
function ppp_filter_checkout_field_group( $field, $key, $args, $value ){
    if( ! ppp_check_persons() ) return $fields; // Exit (not enough persons)

    ob_start();

    echo "<h3>Deelnemers</h3>";

    $cart_items = WC()->cart->get_cart();
    $nb_items   = sizeof($cart_items);
    $count      = 1;

    // Loop through cart items;
    foreach( $cart_items as $cart_item) {
        $persons = $cart_item['booking']['_persons'][0];

        if ( $persons > 1  && $persons != 1 ) {
            echo '<h4 style="font-size:135%;">Item'.$count.'</h4>';

            for ( $i = 1, $j = 2; $i < $persons; $i++, $j++)
            {
                echo '<span style="margin-bottom:12px;display:inline-block;font-size:112%;">' . __("Deelnemer") . ' ' . $j . '</span>';

                echo woocommerce_form_field( "participant[$count][$j][fname]", array(
                    "type" => "text",
                    "return" => true,
                    "value" => "",
                    "required"      => true,
                    "label" => __( "Naam" )
                ) );

                echo woocommerce_form_field( "participant[$count][$j][email]", array(
                    "type" => "email",
                    "return" => true,
                    "value" => "",
                    "required"      => true,
                    "label" => __( "Emailadres" )
                ) );

            }
            echo '<br>';
        }
        $count++;
    }
    return ob_get_clean();
}

// display the extra field on the checkout form
add_action( 'woocommerce_checkout_after_customer_details' ,'ppp_extra_checkout_fields' );
function ppp_extra_checkout_fields(){
    $checkout = WC()->checkout();

    foreach ( $checkout->checkout_fields['extra_fields'] as $key => $field )
    {
        woocommerce_form_field( $key, $field, $checkout->get_value( $key ) );
    }
}

// Validate custom checkout fields
add_action( 'woocommerce_after_checkout_validation', 'ppp_checkout_field_participant_details_validation', 20, 2 );
function ppp_checkout_field_participant_details_validation( $data, $errors ){
    if ( !( isset($_POST['items_count']) && ! empty($_POST['items_count']) ) ) return; // Exit

    for ( $h = 1; $h <= esc_attr( $_POST['items_count'] ); $h++ )
    {
        if ( isset( $_POST['persons_'.$h] ) && $_POST['persons_'.$h] > 1 )
        {
            for ( $i = 1, $j = 2; $i < esc_attr( $_POST['persons_'.$h] ); $i++, $j++ )
            {
                if ( isset( $data['participant'][$h][$j]['fname'] ) && empty( $data['participant'][$h][$j]['fname'] ) )
                    $errors->add( 'participant_'.$h.'_'.$j.'_fname',  __( "Please fill in the participant $j full name (Item $h)" ), 'error' );

                if ( isset( $data['participant'][$h][$j]['email'] ) && empty( $data['participant'][$h][$j]['email'] ) )
                    $errors->add( 'participant_'.$h.'_'.$j.'_email',  __( "Please fill in the participant $j email address (Item $h)" ), 'error' );
            }
        }
    }
}


// Save custom fields values in the order as meta data
add_action( 'woocommerce_checkout_create_order', 'ppp_custom_fields_checkout_create_order', 20, 2 );
function ppp_custom_fields_checkout_create_order( $order, $data ){
    if ( !( isset($_POST['items_count']) && ! empty($_POST['items_count']) ) ) return; // Exit

    // Save number of different items in cart
    $order->update_meta_data( '_items_count', esc_attr( $_POST['items_count'] ) );

    for ( $h = 1; $h <= esc_attr( $_POST['items_count'] ); $h++ )
    {
        if ( isset( $_POST['persons_'.$h] ) && $_POST['persons_'.$h] > 1 )
        {
            // Save number of persons for each item in cart
            $order->update_meta_data( '_item_'.$h.'_persons', esc_attr( $_POST['persons_'.$h] ) );

            for ( $i = 1, $j = 2; $i < esc_attr( $_POST['persons_'.$h] ); $i++, $j++ )
            {
                // Save number of persons for each item in cart
                if ( isset( $data['participant'][$h][$j]['fname'] ) ){
                    $full_name = sanitize_text_field( $data['participant'][$h][$j]['fname'] );
                    $order->update_meta_data( '_participant_'.$h.'_'.$j.'_fname', $full_name );
                }

                if ( isset( $data['participant'][$h][$j]['email'] ) ){
                    $email_address = sanitize_text_field( $data['participant'][$h][$j]['email'] );
                    $order->update_meta_data( '_participant_'.$h.'_'.$j.'_email', $email_address );
                }
            }
        }
    }
}

代码位于活动子主题（或活动主题）的 function.php 文件中。经过测试并有效。

在订单前端和后端和/或电子邮件通知中显示数据对于处理其他所有内容的这个答案来说太宽泛了。要在管理订单编辑页面中的客户详细信息下方显示这些数据，这不是一个好主意，应该在自定义元框中完成。