How to update woocommerce cart if maximum items limit reached?

Hello, welcome to therichpost.com. In this post, I will tell you, How to update woocommerce cart if maximum items limit reached? WordPress is the best cms and Woocommerce is the best Ecommerce plugin. WordPress hooks(add_action, add_filter) give us the power to edit or change the code without interruption into the files and this is the best thing about wordpress. Now I am going to tell you how the hooks work.

In this post, I am doing, if woocommerce cart item quantity is 2 and we will add more items then previous 2
  items will me remove because I set the woocommerce maximum item limit is 2.

Here is the working woocommerce hook for update woocommerce cart if maximum items limit reached and you need to add this hook into your theme’s functions.pgp file:

add_filter( 'woocommerce_add_to_cart_validation', 'therichpost_in_cart', 99, 2 );

function therichpost_in_cart( $passed, $added_product_id ) {

global $woocommerce;

// empty cart: new item will replace previous

$_cartQty = count( $woocommerce->cart->get_cart() );
if($_cartQty >= 2){
    $woocommerce->cart->empty_cart();   
}

// display a message if you like
wc_add_notice( 'Product added to cart!', 'notice' );

return $passed;
}