Build Woocommerce store in Oxygen part 2 - PHP code blocks

//-------------QUANTITY IN CART (activate relevant snippet for this to work) -------------------

<?php

global $product;


$product_id = $product->get_id();
   $in_cart = false;

   foreach( WC()->cart->get_cart() as $cart_item ) {
      $product_in_cart = $cart_item['product_id'];
      if ( $product_in_cart === $product_id ) $in_cart = true;
   }

   if ( $in_cart ) {

     echo do_shortcode('[product_qty id="'. $product_id . '"]');

   }

?>


//------------------BUY NOW BUTTON---------------------

<a href="<?php echo esc_url(home_url( '/' ));?>checkout/?add-to-cart=<?php the_ID();?>" class="quick-buy single_add_to_cart_button button alt" ><?php esc_html_e('Buy now', 'demo.local'); ?></a>