Wondering if there’s a way to edit our search.php or .htaccess or function.php (or anything else…) so that our search function on our main site (www.oursite.com) includes the subdomain of blog.ourwebsite.com?
Any thoughts or suggestions are appreciated it..
If you transform your main website’s WordPress into a multi-site environment, you can move blog.yourdomain.com to be a network site.
Once you do this, you could use the Multisite Global Search plugin to add a widget that searches all network sites.
It would be easy to move your standalone blog.yourwebsite.com to a network site:
Done.
PS – You’d need to copy any themes and plugins you have on blog2.yourdomain.com into the main WordPress installation.