There is actually an existing tool called Sitewide Tags that takes care of this. Essentially, it creates an extra hidden site on your network and mirrors content from each of your other sites on it. Then, when you search, you search against the hidden site and get links back to the original content location. I’ve … Read more
Use the plugin WordPress MU Domain Mapping. Read the installation instructions very carefully. There is also an ebook WordPress Multisite 101 where you can read more (like migration from single site installation etc.). You can activate themes per single site as usual. Or set the constant WP_DEFAULT_THEME in your wp-config.php depending on the host name: … Read more
That’s pretty simple: You’re trying to get the parent property from the $post object, but that is either NULL or simply not attached. In both cases, you are Trying to get property of non-object from the $post object. Simply check if ( isset( $post->parent ) ) { /* do stuff */ }.
I imported/exported between a single wordpress blog and a multisite wordpress without problems, many times. Personally on a multi-site wordpress I have a parent generic theme and each website has it’s own child theme with as few files as possible, mostly only html/css for custom post types. Security issues or big complicated options are most … Read more
Define the constants WPMU_PLUGIN_DIR and WPMU_PLUGIN_URL depending on the host or path in you wp-config.php.
if it’s the same database, you can write the query easily using the global $wpdb variable. If it’s a separate database, create another instance of wordpress wpdb class & write the queries to it $wpdb2 = new wpdb( $user, $pass, $db, $host ); In any case, you’ll need to know the database tables prefix UPDATE … Read more
Install WordPress MU Domain MappingPlugin, and edit the wp_domain_mapping database table. Insert a new row for blog_id #1 manually, for example: +——+———–+———————-+———-+ | id | blog_id | domain | active | +——+———–+———————-+———-+ | 5 | 1 | secure.primary.com | 1 | +——+———–+———————-+———-+
The easiest way to go would be to use an “Origin Pull” CDN. These sorts of delivery networks pull media directly from your site, cache it (usually for the TTL defined by your Cache related HTTP headers). Any origin pull CDN will work fine with multi-site. You rewrite all static resource URLs in your content … Read more
Does a double install sound feasible and the right approach? Given your restrictions, yes…I can’t think of any other way to do it with a single install. If there was a way to get the legacy software to control member accounts via any other system (perhaps dumping to a CSV which can then be read … Read more
I think you can use this plugin: http://wordpress.org/extend/plugins/wpmu-plugin-stats/screenshots/ Provides info to site admins as to which plugins are activated sitewide, and which blogs plugins are activated on. This plugin is using get_plugins() http://codex.wordpress.org/Function_Reference/get_plugins and fetches get_option(‘active_plugins’) for each blog to compare. It uses switch_to_blog() on each blog so it might be slower on large multisites, … Read more