Free shipping for the 100 first customers in Woocommerce - php

Question

I am trying to find a way in Woocommerce to allow free shipping for the first 100 customers as a promotional event.
Once the limit of 100 first customers is reached, then standard shipping will be applied.
Is this possible? How can I do that?

Answer 1

Here is a simple the way to do it with the 2 hooked functions below that will:
Auto Add a coupon code to cart with "Free shipping" option enabled to 1st 100 customers.
To hide other shipping methods when "Free shipping" is available.
But you will have:
In WooCommerce > Settings > shipping, for each shipping zone set a "Free shipping" Method and chose one of this options:
A valid free shipping coupon
A minimum order amount OR a coupon
To set a special coupon code before in WooCommerce > Coupons with the following settings:
General > Discount type: Fixed cart
General > Amount: 0
General > Allow free shipping: enabled
Usage limit > Usage limit per coupon: 100
Usage limit > Usage limit per user: 1
Here is the code:
// Auto apply "free_shipping" coupon for first hundred
add_action( 'woocommerce_before_calculate_totals', 'auto_apply_free_shipping_coupon_first_hundred', 20, 1 );
function auto_apply_free_shipping_coupon_first_hundred( $cart ) {
// HERE define your free shipping coupon code
$coupon_code = 'summer';// 'freeship100';
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// Get an instance of the WC_Coupon object
$coupon = new WC_Coupon( $coupon_code );
// After 100 usages exit
if( $coupon->get_usage_count() > 100 ) return;
// Auto-apply "free shipping" coupon code
if ( ! $cart->has_discount( $coupon_code ) && is_cart() ){
$cart->add_discount( $coupon_code );
wc_clear_notices();
wc_add_notice( __('You have win Free shipping for the first 100 customers'), 'notice');
}
}
// Hide Others Shipping methods when "Free shipping is available
add_filter( 'woocommerce_package_rates', 'hide_others_when_free_shipping_is_available', 100 );
function hide_others_when_free_shipping_is_available( $rates ) {
$free = array();
foreach ( $rates as $rate_id => $rate ) {
if ( 'free_shipping' === $rate->method_id ) {
$free[ $rate_id ] = $rate;
break;
}
}
return ! empty( $free ) ? $free : $rates;
}
Code goes in function.php file of your active child theme (or theme) or also in any plugin file.
This code is tested and works for WooCommerce version 3+