Built in! WordPress comes with feature for this: »MU« or Multisite or Network. You can read more about it in Codex. Summed up The most important part is a single line in your wp-config.php file: define( ‘WP_ALLOW_MULTISITE’, true ); Then you have to decide whether you want to use sub domains or sub directories. One … Read more
I’ve been looking for details on why that line is suggested for a multisite install using subdomains as well. I actually question if both of these are relevant for a subdomain install: RewriteRule ^(wp-(content|admin|includes).*) $1 [L] RewriteRule ^(.*\.php)$ $1 [L] In a sub-directory install the rules are setup slightly different to strip the sub-directory name … Read more
add_filter( ‘option_uploads_use_yearmonth_folders’, ‘__return_false’, 100 ); That’s all you need, seriously!
Because it is a wiki, the codex is a notoriously unreliable source of information (but you probably already knew that). However, it is probably true that uninstalling on huge networks will not scale. What I do in one of my plugins is run the plugin’s uninstall routine on all sites, unless wp_is_large_network() is true. On … Read more
I believe you’re looking for the network_admin_menu hook. Here’s how you’d use it: add_action(‘network_admin_menu’, ‘function_name’); function function_name() { add_menu_page( “page_title”, “menu_title”, ‘capability’, ‘menu_slug’, ‘function_callback’ ); }
Emails can not be used as user names as wordpress uses user names by default as part of urls (for example the author page). Therefor it is not enough to let users register with email addresses, you also need to have some code to handler the URL related issues. Anyway this sounds like an XY … Read more
update_site_option() updates an option that’s set for the entire network. If you’re trying to update a specific site’s option, eg blogname, you’ll need to do update_option() instead. If you’re not sure of a site’s ID, you can get its details using the site’s slug with get_blog_details(). For example, if I wanted to change the admin_email … Read more
Hook the script into the footer, which is easy enough. http://wpmututorials.com/plugins/how-to-hook-into-the-footer/ As stated in the post, toss that into mu-plugins, it will track all your site, regardless of domain. GA can sort it out on their end. totally do-able.
I assume you are not interested in multisite network, but in managing multiple separate blogs? By description this sounds like ManageWP (for the record hadn’t used it myself).
Your answer, Kyle, is the mu_plugins folder. Create it within wp-content. Any php file put in here will be automatically loaded into ALL multisite blogs (or any non-multisite blogs). This is a great area to put plugins vital to the site working, or shared functionality such as custom post types, taxonomies, filters, etc. Really anything! … Read more