You need to check if the siteurl differs from the home URL: if ( get_option( ‘siteurl’ ) !== get_option( ‘home’ ) ) { // whatever This also works if home is a subdirectory of the root, with WordPress installed in yet another subdirectory. For example: domain.com/blog (URL) and domain.com/blog/wordpress (siteurl).
I just did this on a client site. I set up my rules like this: RewriteEngine on RewriteCond %{HTTP_HOST} ^(.*)fsdegrees.com [NC] RewriteRule ^(.*)$ http://www.56degrees.co.uk/$1 [R=301,L] The first rule checks the incoming domain and verifies that it is the old domain. The second sends a 301 redirect and visitors are sent to the corresponding page on … Read more
If you want sections in a subdomain and in subdirectories, use a multi-site installation. See Create a Network and our tag multi-site. Then you set the the blog and the shop as separate sites, and the portfolio as a custom post type or as a regular page in the main blog.
What I basically did was the following: Used Domain Mapping plugin in wp-config.php – Changed DOMAIN_CURRENT_SITE and NOBLOGREDIRECT to $_SERVER[‘HTTP_HOST’] as per what @toscho suggested in wp-config.php – Added: define(‘DOMAINMAPPING_ALLOWMULTI’, ‘yes’); // Allow sites to have multiple domains define(‘SUNRISE’, ‘on’); // Domain mapping plugin activation mapped relevant sub.domain.com to relevant sub.domain.eu The main site can … Read more
WP multisite (subdomain) is the answer – http://codex.wordpress.org/Create_A_Network In addition you can install the WP Domain Mapping Plugin to run on other domains You need to decide whether you want WP multisite subdomain or sub-directory installation. WP subdomain does exactly what you want, but WP subdir + domain mapping plugin allows you to have both … Read more
You can not run different networks or different Multisite installations under one domain in the default possibilities of WP. But you can use one Multiste with multiple networks with the help of a plugin – https://wordpress.org/plugins/wp-multi-network/ With this plugin get you the chance to create different networks with sites in one installation, one Multisite. Like … Read more
Migrate DB Pro can help with this, make sure to migrate any plugin tables and the WP_Users and WP_Usermeta tables if your users make posts and you want that content to remain assigned an available make sure to keep WP_Posts and WP_Postmeta table as well. https://deliciousbrains.com/wp-migrate-db-pro/ Also keep in mind that WP uses an EAV … Read more
Let’s establish the baseline: it is possible to have the main site in example-domain-x.com and all subsites subdomains in example-domain-y.com. You just add subdomain1.example-domain-y.com (or subdomain2.example-domain-y.com, subdomain3.example-domain-y.com) like you would be adding a bare or www domain in the domain mapping panel ( URL containing wp-admin/network/settings.php?page=dm_domains_admin ). To achieve the same programmatically, you could hook … Read more
Every thing you need is covered in the codex Moving WordPress entry.
This question has been discussed several times on the WordPress Hackers email list, I’d recommend Googling something like wp-hackers absolute relative to get an overview of the various lively debates that have taken place over the years. Personally I use the searchreplacedb2 script whenever I migrate a database between URLs, e.g. from live to local/test/dev.