Making Multisite Work for You BEN BYRNE CORNERSHOP CREATIVE

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2 2 Making Multisite Work for You BEN BYRNE CORNERSHOP CREATIVE

3 3 What is Multisite?

4 4 Multisite is Multiple sites using one installation Shared codebase Shared database but mostly separate tables Used by wpengine, wordpress.com, wordcamp.org, and many others

5 5 Good for A network of blogs (or personal fundraising sites!) An association with local chapters Rapid-launch campaign sites

6 6 Bad for When sites need to be on multiple hosts When sites need to have separate databases* When each site will need its own IP address. Site administrators will need to install their own themes or plugins. Temporary setups Limited hosts

7 7 Cons Separating out multisite sites into individual sites Single point of failure Confusing and complicated Code changes affect all sites

8 8 Enabling Multisite define( 'WP_ALLOW_MULTISITE', true );

9 9 URL Handling 1. Subdomain site1.domain.org site2.domain.org 3. Separate Domains domain.org otherdomain.org 2. Subdirectory domain.org/site1 domain.org/site2

10 10 Not so fast Sub-directory approach won t be offered by WordPress if your site is more than 30 days old permalink conflicts Sub-domain won t work if the URL is localhost, is an IP address, has a port, or if WP is in a subdirectory Unique domains won t work without a plugin and some code

11 11 Open or closed? Public aka Open: anyone can create a blog/site Good for schools, social fundraisers, etc. But can be scary Private aka Closed: only administrator can add new Much safer, but more limited

12 12 define( DISALLOW_FILE_EDIT, true );

13 13 Network admin role /wp-admin/network manage_network manage_sites manage_network_users manage_network_plugins manage_network_themes manage_network_options User Role Editor is your friend

14 14 Shared users Users can be assigned to one site or many Single login gives access to all sites they re assigned to But that means user profiles are consistent across all sites*

15 15 Shared Themes & Plugins Restrict theme availability to certain sites Pro-tip: use child themes! Plugins available to all Activate per-site or network activate mu-plugins directory: can t be deactivated but don t work like regular plugins

16 16 Plugin Stuff Not all plugins are multisite friendly Others might have network-specific settings Plenty of plugins specifically for multisite Individual Multisite Author One-Click Child Theme

17 17 Nerdy You ll find the the.htaccess, wp-config.php different wp-content/uploads is different: sites dir, every site gets an id number Be thoughtful about (s)ftp access mysql tables aplenty Hosting is critical many WP-optimized hosts don t support multisite

18 18 Database Structure wp_blogs wp_blog_versions wp_registration_log wp_signups wp_site wp_sitemeta wp_users wp_usermeta wp_options wp_posts wp_postmeta wp_comments wp_commentmeta wp_terms wp_termmeta wp_term_taxonomy wp_term_relationships wp_2_options wp_2_posts wp_2_postmeta wp_2_comments wp_2_commentmeta wp_2_terms wp_2_termmeta wp_2_term_taxonomy wp_2_term_relationships

19 19 Site

20 20 A blog is a site and a site is a network

21 21 Ramifications Global objects: $current_site $current_blog get_current_site()!= get_blog_details() get_site_option() vs. get_option() Counterintuitive: more like get_network_option() wp_get_sites(); unless wp_is_large_network() is true

22 22 switch_to_blog()

23 23 switch_to_blog() Changes DB prefix Re-initializes user roles Doesn t verify $site_id Doesn t change translation or permalink settings restore_current_blog() backs up just 1 step use ms_is_switched() to check state

24 24 Other handy stuff is_network_admin(); is_multisite(); get_blog_list(); => wp_get_sites(); update_blog_option( $blog_id, $key, $value ); is_archived( $blog_id ); is_user_member_of_blog( $user_id, $blog_id ); compare with get_blogs_of_user( $user_id );

25 25 Thank You