CODE EXAMPLE FOR PHP

woocommerce empty cart button

// adds the button to the cart page
add_action( 'woocommerce_cart_actions', 'woocommerce_empty_cart_button' );
function woocommerce_empty_cart_button() {
    echo '<a href="' . esc_url( add_query_arg( 'empty_cart', 'yes' ) ) . '" class="button" title="' . esc_attr( 'Empty Cart', 'woocommerce' ) . '">' . esc_html( 'Empty cart', 'woocommerce' ) . '</a>';
}

// empty the cart and refresh the page (redirects to the cart page)
add_action( 'wp_loaded', 'woocommerce_empty_cart_action', 20 );
function woocommerce_empty_cart_action() {
    if ( isset( $_GET['empty_cart'] ) && 'yes' === esc_html( $_GET['empty_cart'] ) ) {
        WC()->cart->empty_cart();
    
        $referer = wc_get_cart_url();
        wp_safe_redirect( $referer );
    }
}