WooCommerce - remove local pickup if free shipping available

woo-shipping-remove-local-if-free.php

<?php 

/**
 * Hide shipping rates when free shipping is available.
 * Updated to support WooCommerce 2.6 Shipping Zones.
 *
 * @param array $rates Array of rates found for the package.
 * @return array
 *
 * removes only LOCAL PICKUP if FREE SHIPPING is available
 * while keeping FREE and other methods in place
 * can be modified to remove other shipping options
 *
 * use as MU plugin
 *
 * original code here: https://woocommerce.com/document/hide-other-shipping-methods-when-free-shipping-is-available/
 * modified by Adam/WPMU DEV
 */
function my_hide_shipping_when_free_is_available( $rates ) {
	
	$new_rates = array();
	$is_free = false; // by default let's assume there's no free shipping
	
	
	
	
	// check if there's free shipping available
	foreach ( $rates as $rate_id => $rate ) {
		if ( 'free_shipping' === $rate->method_id ) {
			$is_free = true; // and set the flag if so
			break;
		}
	}
	
	// if there's free shipping, loop over shipping options again
	// and rewrite them removing the "flat_rate" only 
	if ( $is_free ) {
		foreach ( $rates as $rate_id => $rate ) {
			if ( 'flat_rate' !== $rate->method_id ) {
				$new_rates[ $rate_id ] = $rate;
			}
		}
	}
	
	// return either original shipping (if no free) 
	// or modified - if there is free 
	return ! empty( $new_rates ) ? $new_rates : $rates;

	
}
add_filter( 'woocommerce_package_rates', 'my_hide_shipping_when_free_is_available', 100 );