Php 当“选择”字段出现在“签出”页面上时，它将显示为。谢谢你的帮助。这完美地解决了问题。非常感谢：） /** * Add custom Pickup Field field to the checkout page */ add_filter( 'woocom

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当“选择”字段出现在“签出”页面上时，它将显示为。谢谢你的帮助。这完美地解决了问题。非常感谢：）

/**
* Add custom Pickup Field field to the checkout page
*/
add_filter( 'woocommerce_after_order_notes', 'hiwoo_add_checkout_fields' );
function hiwoo_add_checkout_fields( $checkout ) {

  $args = array(
    'post_type'         => 'pickup-point',
    'posts_per_page'    => -1,
    'post_status'       => 'publish'
    );

// Custom query to pull in the pickup points.
$query = new WP_Query( $args );

$pickup_comb_option = [];

while ($query->have_posts()) {
    $query->the_post();

    $postid = $post->ID;
    $pickuptitle = get_the_title($post);
    $pickupdate = get_post_meta(get_the_id($post), 'available_date', true);

    $pickupoption = $pickuptitle . ' - ' . $pickupdate;
    array_push($pickup_comb_option, $pickupoption);
}

var_dump($pickup_comb_option);

// Restore original post data.
wp_reset_postdata();


echo '<div id="custom_checkout_field"><h2>' . __('Order Pickup Location/Date') . '</h2>';

 woocommerce_form_field( 'pickup_point_options', array(
        'type' => 'select',
        'class' => array(
        'my-field-class form-row-wide'
            ) ,
        'label' => __('Select Pickup Location/Date') ,
        'placeholder' => __('Pickup Point') ,
        'options' => $pickup_comb_option,
        ), 
        $checkout->get_value( 'pickup_point_options' ));

echo '</div>';

} /* Close custom field function */

/**
 * Process the checkout
 */
add_action('woocommerce_checkout_process', 'my_custom_checkout_field_process');

function my_custom_checkout_field_process() {
    // Check if set, if its not set add an error.
    if ( ! $_POST['pickup_point_options'] )
        wc_add_notice( __( 'Please select a pickup location from the list.' ), 'error' );
}

/**
 * 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['pickup_point_options'] ) ) {
        update_post_meta( $order_id, 'Pickup Location/Date', sanitize_text_field( $_POST['pickup_point_options'] ) );
    }
}

/**
 * Display field value on the order edit page
 */
add_action( 'woocommerce_admin_order_data_after_billing_address', 'my_custom_checkout_field_display_admin_order_meta', 10, 1 );

function my_custom_checkout_field_display_admin_order_meta($order){
    echo '<p><strong>'.__('Pickup Location/Date').':</strong> ' . get_post_meta( $order->id, 'Pickup Location/Date', true ) . '</p>';
}

array(3) {
  [0]=>
  string(32) "Tain Farmers Market - 2019-12-25"
  [1]=>
  string(30) "Hi Create Offices - 2019-10-25"
  [2]=>
  string(27) "Dornoch Stores - 2019-09-26"
}


<select name="pickup_point_options" id="pickup_point_options" class="select " data-placeholder="Pickup Point">
    <option value="0">Tain Farmers Market - 2019-12-25</option>
    <option value="1">Hi Create Offices - 2019-10-25</option>
    <option value="2">Dornoch Stores - 2019-09-26</option>
</select>

$pickup_comb_option = [];

while ($query->have_posts()) {
    $query->the_post();

    // ...
    // change this line
    array_push($pickup_comb_option, $pickupoption); 
    // to:
    $pickup_comb_option[$pickupoption] = $pickupoption;
}

<select>
   <option value="Tain Farmers Market">Tain Farmers Market</option>
</select>