Here’s how you can get the ID of the main site in a WordPress multisite network. This can be useful for switching to that blog using switch_to_blog( $blog_id ) to gain access to data from that site, then switching back with restore_current_blog() for example.
| <?php | |
| /* | |
| * Get the Blog ID of the main site in a multisite network. | |
| * | |
| * @return int The blog_id of the main site. | |
| */ | |
| function km_get_main_site_blog_id() { | |
| return get_network()->site_id; | |
| } |
Alternate function for WordPress versions < 4.6.0
For sites running a WordPress version lower than 4.6.0, the function below can be used as an alternative. Note that although the $current_site global variable name in the code below makes it look like we’re getting the blog ID for the current site, $current_site actually refers to the data WordPress has stored related to the main site specifically, which is what we want.
| <?php | |
| /* | |
| * Get the ID of the main site in a multisite network | |
| * | |
| * @return int The blog_id of the main site | |
| */ | |
| function km_get_main_site_id() { | |
| global $current_site; | |
| return $current_site->blog_id; | |
| } |
Written by Kellen Mace, who lives in Rochester Hills, MI and builds cool stuff on the web. About Kellen // Follow him on Twitter →