Hide shipping rates if free shipping available - Hide non-free shipping rates if zero cost shipping rates are available. https://www.damiencarbery.com/2024/01/hide-shipping-rates-if-free-shipping-available/

hide-non-free-shipping-rates.php

<?php
/*
Plugin Name: Hide shipping rates if free shipping available
Plugin URI: https://www.damiencarbery.com/2024/01/hide-shipping-rates-if-free-shipping-available/
Description: Hide non-free shipping rates if zero cost shipping rates are available.
Author: Damien Carbery
Version: 0.1
WC tested up to: 8.4.0
*/


defined( 'ABSPATH' ) || exit;


// Inspired by: https://www.businessbloomer.com/woocommerce-hide-shipping-options-free-shipping-available/

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


	// Set up WordPress specfic actions.
	private function init() {
		add_filter( 'woocommerce_package_rates', array( $this, 'unset_non_zero_shipping_when_free_ones_available' ), 9999, 2 );
	}


	// Hide non-zero rates when free ones available.
	// The free ones can be Free Shipping, Local Pickup or even Flat Rate, as long as the cost is zero.
	public function unset_non_zero_shipping_when_free_ones_available( $rates, $package ) {
		$all_free_rates = array();
		foreach ( $rates as $rate_id => $rate ) {
			if ( $rate->get_cost() == 0 ) {
				$all_free_rates[ $rate_id ] = $rate;
			}
		}

		// If no free rates available then return the passed rates unmodified.
		if ( empty( $all_free_rates )) {
			return $rates;
		} else {
			// If free ones found then return them.
			return $all_free_rates;
		}
	}
}
$HideNonFreeRatesWhenFreeAvailable = new HideNonFreeRatesWhenFreeAvailable();