Filters the main site ID.

Returning a positive integer will effectively short-circuit the function.

$main_site_id int|null

If a positive integer is returned, it is interpreted as the main site ID.

$network WP_Network

The network object for which the main site was detected.

File: wp-includes/class-wp-network.php. View all references

$main_site_id = (int) apply_filters( 'pre_get_main_site_id', null, $this );