试试这个方法，看看你会得到什么：
<?php
/**
* Order Item Details
*
* This template can be overridden by copying it to yourtheme/woocommerce/order/order-details-item.php.
*
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
if ( ! apply_filters( 'woocommerce_order_item_visible', true, $item ) ) {
return;
}
$sessions = "sessions"; //DEFINE THE SESSIONS STRING...
?>
<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'order_item', $item, $order ) ); ?>">
<td class="product-name">
<?php
$is_visible = $product && $product->is_visible();
echo apply_filters( 'woocommerce_order_item_name', $is_visible ? sprintf( '<a href="%s">%s</a>', get_permalink( $item['product_id'] ), $item['name'] ) : $item['name'], $item, $is_visible );
echo apply_filters( 'woocommerce_order_item_quantity_html', ' <strong class="product-quantity">' . sprintf( '× %s', $item['qty'] ) . '</strong>', $item );
do_action( 'woocommerce_order_item_meta_start', $item_id, $item, $order );
$order->display_item_meta( $item );
$order->display_item_downloads( $item );
do_action( 'woocommerce_order_item_meta_end', $item_id, $item, $order );
//PERHAPS RIGHT HERE ADD THE SESSION
// IT IS IMPORTANT TO PASS IN THE PRODUCT-ID: $item['product_id'] SO THAT THE CORRECT FIELD IS RETRIEVED.
echo "<p class='session'><strong>" .__("Session: ", "ttd") . "</strong><em class='session-value'>" . get_field($sessions, $item['product_id']) . "</em></p>";
//OR THIS WAY
echo "<p class='session'><strong>" .__("Session: ", "ttd") . "</strong><em class='session-value'>" . get_post_meta($item['product_id'], $sessions, true) . "</em></p>";
?>
</td>
<td class="product-total">
<?php echo $order->get_formatted_line_subtotal( $item ); ?>
</td>
</tr>
<?php if ( $show_purchase_note && $purchase_note ) : ?>
<tr class="product-purchase-note">
<td colspan="3"><?php echo wpautop( do_shortcode( wp_kses_post( $purchase_note ) ) ); ?></td>
</tr>
<?php endif; ?>
或者，您也可以这样做：
<?php
/**
* Order Item Details
*
* This template can be overridden by copying it to yourtheme/woocommerce/order/order-details-item.php.
*
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
if ( ! apply_filters( 'woocommerce_order_item_visible', true, $item ) ) {
return;
}
$sessions = "sessions"; //DEFINE THE SESSIONS STRING...
?>
<tr class="<?php echo esc_attr( apply_filters( 'woocommerce_order_item_class', 'order_item', $item, $order ) ); ?>">
<td class="product-name">
<?php
$is_visible = $product && $product->is_visible();
echo apply_filters( 'woocommerce_order_item_name', $is_visible ? sprintf( '<a href="%s">%s</a>', get_permalink( $item['product_id'] ), $item['name'] ) : $item['name'], $item, $is_visible );
echo apply_filters( 'woocommerce_order_item_quantity_html', ' <strong class="product-quantity">' . sprintf( '× %s', $item['qty'] ) . '</strong>', $item );
do_action( 'woocommerce_order_item_meta_start', $item_id, $item, $order );
$order->display_item_meta( $item );
$order->display_item_downloads( $item );
do_action( 'woocommerce_order_item_meta_end', $item_id, $item, $order );
?>
</td>
<td class="product-session">
<!-- ALTERNATIVELY ADD THE SESSION RIGHT HERE ON A UNIQUE COLUMN-->
<!-- IT IS IMPORTANT TO PASS IN THE PRODUCT-ID: $item['product_id'] SO THAT THE CORRECT FIELD IS RETRIEVED.-->
<p class='session'>
<strong><?php echo __("Session: ", "ttd"); ?></strong>
<em class='session-value'><?php the_field($sessions, $item['product_id']); ?></em>
</p>
<!-- OR THIS WAY -->
<p class='session'>
<strong><?php echo __("Session: ", "ttd"); ?></strong>
<em class='session-value'><?php echo get_post_meta($item['product_id'], $sessions, true); ?></em>
</p>
</td>
<td class="product-total">
<?php echo $order->get_formatted_line_subtotal( $item ); ?>
</td>
</tr>
<?php if ( $show_purchase_note && $purchase_note ) : ?>
<tr class="product-purchase-note">
<td colspan="3"><?php echo wpautop( do_shortcode( wp_kses_post( $purchase_note ) ) ); ?></td>
</tr>
<?php endif; ?>
然后，找到文件 /templates/order/order-details.php。选择第 1 到 35 行并将下面的代码粘贴到上面：
<?php
/**
* Order details
*
* This template can be overridden by copying it to yourtheme/woocommerce/order/order-details.php.
*
* HOWEVER, on occasion WooCommerce will need to update template files and you (the theme developer).
* will need to copy the new files to your theme to maintain compatibility. We try to do this.
* as little as possible, but it does happen. When this occurs the version of the template file will.
* be bumped and the readme will list any important changes.
*
* @see http://docs.woothemes.com/document/template-structure/
* @author WooThemes
* @package WooCommerce/Templates
* @version 2.5.3
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
$order = wc_get_order( $order_id );
$show_purchase_note = $order->has_status( apply_filters( 'woocommerce_purchase_note_order_statuses', array( 'completed', 'processing' ) ) );
$show_customer_details = is_user_logged_in() && $order->get_user_id() === get_current_user_id();
?>
<h2><?php _e( 'Order Details', 'woocommerce' ); ?></h2>
<table class="shop_table order_details">
<thead>
<tr>
<th class="product-name"><?php _e( 'Product', 'woocommerce' ); ?></th>
<th class="product-session"><?php _e( 'Session', 'your_ttd' ); ?></th> <!-- HERE WE ARE ADDING A COLUMN TO THE HEAD AS WELL TO MATCH...-->
<th class="product-total"><?php _e( 'Total', 'woocommerce' ); ?></th>
</tr>
</thead>
<tbody>
希望这会有所帮助...