This can be done a lot easier. It is just necessary to change the permalinks settings accordingly – as mentioned on github at the issue 3145:
Meet this criteria:
// If permalinks contain the shop page in the URI prepend the breadcrumb with shop if ( $shop_page_id && strstr( $permalinks['product_base'], "https://wordpress.stackexchange.com/" . $shop_page->post_name ) && get_option( 'page_on_front' ) !== $shop_page_id ) { $prepend = $before . '<a href="' . get_permalink( $shop_page ) . '">' . $shop_page->post_title . '</a> ' . $after . $delimiter; }Otherwise its never prepended.
To apply this one has to go to:
→ WordPress Backend → Settings → Permalinks
And set the woocommerce permalinks settings to one of these:
- Shop Base
- Shop Base With Category
- Custom Base
If the latter is used the slug »/shop/…« has to be prepended.
There is an issue 6584:
Warning: preg_match(): Unknown modifier ‘t’ in wc-core-functions.php on line 533
Which for example occures if the »Custom Base« looks like this: »/shop/product/…«. There is a commit that fixed it, which is available in master, but not 2.2.8.
The slug part shop can be replaced by something else too, for example something localized.