Multiple Domain

Multiple Domain allows you having more than one domain in a single WordPress installation. This plugin doesn't support more than one theme or advanced customizations for each domain. It's only intended to enable constant navigation under many domains. For a more complex setup, there is WordPress Multisite (MU).

When there is more than one domain set in your host, all links and resources will point to the default domain. This is the default WordPress behavior. With Multiple Domain installed and properly configured, it'll update all link on the fly. This way, the user navigation will be end-to-end under the same domain.

You can also set an optional base URL. If you want only a set of URL's available under a given domain, you can use this restriction.

Additionally, a language can be set for each domain. The language will be used to add <link> tags with hreflang attribute to document head. This is for SEO purposes.

Check the plugin page at WordPress.org: https://wordpress.org/plugins/multiple-domain/

Installation

Follow the steps below to install the plugin:

Upload the plugin files to the /wp-content/plugins/multiple-domain directory, or install the plugin through the WordPress plugins screen directly.
Activate the plugin through the 'Plugins' screen in WordPress.
Use the Settings -> General screen to configure your additional domains.

Frequently Asked Questions

Does this plugin set extra domains within my host?

No. You have to set additional domains, DNS, and everything else to use this plugin.

Can I have a different theme/content/plugins for each domain?

Nope. If you want a complex set up like this, you may be interested in WordPress Multisite. It's delivered with every WordPress installation since 3.0, you can find more info here: https://codex.wordpress.org/Create_A_Network.

There is a way to add domain based logic to my themes?

Absolutely. You can use the MULTPLE_DOMAIN_DOMAIN and MULTPLE_DOMAIN_ORIGINAL_DOMAIN constants to get the current and original domains. Just notice that since the value of the first one is checked against plugin settings, it may not reflect the actual domain in HTTP_HOST element from $_SERVER or user's browser. They also may include the host port when it's different than 80 (default HTTP port) or 443 (default HTTPS port).

Can I create a custom access restriction logic for each domain?

Yes. You can use the multiple_domain_redirect action to do that. Please check straube#2 for an example on how to do that.

Can I get the language associated with the current domain?

Yes. You can use the MULTPLE_DOMAIN_DOMAIN_LANG constant to get the language associated with the current domain. Keep in mind the value in this constant doesn't necessarily reflect the actual user language or locale. This is just the language set in the plugin config. Also notice the language may be null.

Can I show the current domain in the content of posts or pages?

Yes. There is a shortcode available for that. Just add [multiple_domain] to the post/page and it'll be replaced by the current domain when viewing the content. You can write things like "Welcome to [multiple_domain]!", which would be rendered as "Welcome to mydomain.com!".

Changelog

0.8.7

Loading Multiple Domain before other plugins to fix issue with paths.
Fix #38: Missing locales on language list (this issue was reopened and now it's fixed)
Refactored initAttributes method.

0.8.6

Fix #39: Rolling back changes introduced in 0.8.4 and 0.8.5 regarding to avoid URL changes in the WP admin.

0.8.5

Fixed an issue introduced in 0.8.4 that breaks the admin URLs.
Fix #38: Missing locales on language list
Add [multiple_domain] shortcode to show the current language.

0.8.4

Fix: #36 Wrong host in URLs returned by the JSON API
Using singleton pattern for main plugin class.
Avoiding URL changes in the admin panel.

0.8.3

Fix: #34 hreflang tag error

0.8.2

Fix: #32 Image URLs not being re-written properly via Tor.

0.8.1

Fix: #23 Undefined index when using wp-cli.

0.8.0

Moved MultipleDomain class to its own file.
Fix: #14 Remove filter_input from plugin.
Attempt to fix #22.
Added MULTPLE_DOMAIN_DOMAIN_LANG constant for theme/plugin customization. Fixes #20.
Fix: #21 No 'Access-Control-Allow-Origin' header is present on the requested resource.

0.7.1

Make the plugin compatible with PHP 5.4 again.

0.7

Code review/refactoring.
Added activation hook to fix empty settings bug.

0.6

Fix: #11 Redirect to original domain if SSL/https.

0.5

Added http/https for alternate link.

0.4

Fixed resolving host name to boolean.
Added Reflang links to head for SEO purpose. e.g.

<link rel="alternate" hreflang="x-default" href="https://example.com/">
<link rel="alternate" hreflang="de-DE" href="https://de.example.com/">

0.3

Fixed bug when removing the port from current domain.
Added MULTPLE_DOMAIN_ORIGINAL_DOMAIN constant to hold the original WP home domain.
Allowing developers to create custom URL restriction logic through multiple_domain_redirect action.
Improved settings interface.

0.2

Improved port verification.
Added MULTPLE_DOMAIN_DOMAIN constant for theme/plugin customization.
And, last but not least, code refactoring.

0.1

This is the first release. It supports setting domains and an optional base URL for each one.

Contributing

Feel free to open a pull request to address any of the issues reported by the plugin users. In case you have questions on how to fix or the best approach, start a discussion on the appropriate thread.

If you want to add a new feature, please open an issue explaining the feature and how it would help the users before start writing your code.

Separate each new feature or improvement into a separate branch in your forked repository.

Guidelines

To make sure every contribution follows the same code style, please follow these rules:

Write PSR-2 compliant code
Use UNIX line returns
Remove trailing white space
Use 4 spaces instead of tabs

Also notice that even if Wordpress has its own code styling guidelines, this plugin doesn't follow it in favor of a global standard (PSR-2).

Donations

If you find this plugin helpful, you can support the work involved buying me a coffee, beer or a Playstation 4 game. You can send donations over PayPal to gustavo.straube@gmail.com.

blazer82/multiple-domain