Custom Field auslesen

add_action( 'woocommerce_product_options_general_product_data', 'wc_custom_add_custom_fields' );
function wc_custom_add_custom_fields() {
    // Gibt ein benutzerdefiniertes Feld im allgemeinen Tab des Produkts aus
    woocommerce_wp_text_input( array(
        'id' => '_lagerplatz',
        'label' => 'Lagerplatz',
        'description' => 'Bitte trage hier den Lagerplatz des Artikel ein.',
        'desc_tip' => 'true',
        'placeholder' => '000-000'
    ) 
    );
}


add_action( 'woocommerce_process_product_meta', 'wc_custom_save_custom_fields' );
function wc_custom_save_custom_fields( $post_id ) {
    if ( ! empty( $_POST['_lagerplatz'] ) ) {
        update_post_meta( $post_id, '_lagerplatz', esc_attr( $_POST['_lagerplatz'] ) );
    }
}


// Code damit bei Bestellungen die bestellten Artikel unter Produkte mit angezeigt werden
add_filter( 'manage_edit-shop_order_columns', 'imarcon_set_custom_column_order_columns');


function imarcon_set_custom_column_order_columns($columns) {
// global $woocommerce;
$nieuwearray = array();
 foreach($columns as $key => $title) {
   if ($key=='billing_address') // in front of the Billing column
     $nieuwearray['order_producten']  = __( 'Products', 'woocommerce' );
    $nieuwearray[$key] = $title;
  }
    return $nieuwearray ;
}


add_action( 'manage_shop_order_posts_custom_column' , 'imarcon_custom_shop_order_column', 10, 2 );
function imarcon_custom_shop_order_column( $column ) {
 global $post, $woocommerce, $the_order;


    switch ( $column ) {


        case 'order_producten' :
            $terms = $the_order->get_items();


          if ( is_array( $terms ) ) {
                 foreach($terms as $term)
        {
        echo $term['item_meta']['_qty'][0] .' x ' . $term['name'] .'<br />';
        }
              } else {
                  _e( 'Unable get the producten', 'woocommerce' );
        }
            break;


    }
}