Show shipping class IDs in WooCommerce - List shipping classes and their IDs for use in custom code. https://www.damiencarbery.com/2022/12/show-shipping-class-ids-in-woocommerce/

wc-show-shipping-class-ids.php

<?php
/*
Plugin Name: Show shipping class IDs in WooCommerce
Plugin URI: https://www.damiencarbery.com/2022/12/show-shipping-class-ids-in-woocommerce/
Description: List shipping classes and their IDs for use in custom code.
Author: Damien Carbery
Version: 0.1
*/


class ShowShippingClassIDs {
	// Returns an instance of this class. 
	public static function get_instance() {
		if ( null == self::$instance ) {
			self::$instance = new self;
		} 
		return self::$instance;
	}


	// Initialize the plugin variables.
	public function __construct() {
		$this->init();
	}


	// Set up WordPress specfic actions.
	public function init() {
		// Print the table with Shipping classes and their IDs.
		add_action( 'woocommerce_settings_shipping', array( $this, 'add_to_shipping_settings' ), 20 );
		// Add CSS to style the table.
		add_action( 'admin_head', array( $this, 'add_shipping_method_ids_css' ) );
	}


	// Return whether on the Shipping classes page.
	private function is_shipping_classes_page() {
		global $current_section;

		if ( !empty( $current_section ) && 'classes' == $current_section ) {
			return true;
		}
		
		return false;

	}
	
	
	public function add_shipping_method_ids_css() {
		if ( $this->is_shipping_classes_page() ) {
?>
<style>
.shipping_classes_ids { border: 1px solid #c3c4c7; }
.shipping_classes_ids td, .shipping_classes_ids th { padding: 5px 10px; background-color: #fff; }
.shipping_classes_ids td { border-bottom: 2px solid #f9f9f9; }
.shipping_classes_ids ul { margin: 0; }
</style>
<?php
		}
	}


	// Print the table with Shipping classes and their IDs.
	public function add_to_shipping_settings() {
		if ( $this->is_shipping_classes_page() ) {
?>
		<h4>Shipping classes IDs</h4>
		<table class="shipping_classes_ids"><tr><th>Class name</th><th>ID</th></tr>
<?php
			// Retrieve all the shipping classes.
			$terms = get_terms( array( 'taxonomy' => 'product_shipping_class' ) );
			foreach ( $terms as $term ) {
				printf( '<tr><td>%s</td><td><strong>%s</strong></td></tr>%s', $term->name, $term->term_id, "\n");
			}
?>
	</table>
<?php
		}
	}
}

$ShowShippingClassIDs = new ShowShippingClassIDs();