Wordpress

Redirect all users, except network administrators, from the main site to a subsite

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I have a WP Multisite / Multi Network installation. What I need is to redirect all non-logged and also all logged in users, except logged in network administrators, from the main site example.com (including all nested pages, posts, categories etc.) to the subsite.example.com, that is a segregated multisite network. They share the same database. The network administrator will have access to the main site only after they will log in on the subsite.example.com. In this way, only the logged in network administrators must have access to the main site example.com.

Limit widget to a specific registered sidebar

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I have a widget I want only allowed to be used with the single.php sidebar. When I referenced the codex for register sidebar there isn’t a way to limit widgets in the array. I’ve researched with “WordPress limit widget to post” but they are only plugins returned in my search results. When I change my search parameters to page to see if I can get something returned I am reference to: