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* Only copy opening php if needed
* Adds a "subscribe and save" box after the add to cart button
* Only added if `subscribe_save_id` field is set
function sww_add_subscribe_save_to_product() {
global $product; // get the current product to see if it has a 'subscribe and save'
$subscription_id = (int) get_post_meta( $product->id, 'subscribe_save_id', true );
// only proceed if we do have a 'subscribe and save'
if ( $subscription_id ) {
$subscription = get_post( $subscription_id );
// output our subscription short description + the add to cart shortcode
echo wp_kses_post( $subscription->post_excerpt );
echo do_shortcode( '[add_to_cart id="' . $subscription_id . '"]' );
add_action( 'woocommerce_single_product_summary', 'sww_add_subscribe_save_to_product', 31 );
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