apply_filters( 'pre_get_main_site_id', int|null $main_site_id, WP_Network $network )

Filters the main site ID.

Description

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

Parameters

$main_site_id: If a positive integer is returned, it is interpreted as the main site ID.
$network: The network object for which the main site was detected.

Source

File: wp-includes/class-wp-network.php

Changelog

Changelog
Version	Description
4.9.0	Introduced.