wphooks.info - pre_get_main_site_id

pre_get_main_site_id

*** New in v4.9 ***

The hook occurs in the following file:

wp-includes/class-wp-network.php:
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		/**
		 * Filters the main site ID.
		 *
		 * Returning a positive integer will effectively short-circuit the function.
		 *
		 * @since 4.9.0
		 *
		 * @param int|null   $main_site_id If a positive integer is returned, it is interpreted as the main site ID.
		 * @param WP_Network $network      The network object for which the main site was detected.
		 */
		$main_site_id = (int) apply_filters( 'pre_get_main_site_id', null, $this );
		if ( 0 < $main_site_id ) {
			return $main_site_id;
		}

		if ( 0 < (int) $this->blog_id ) {
			return (int) $this->blog_id;
		}

		if ( ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) && $this->domain === DOMAIN_CURRENT_SITE && $this->path === PATH_CURRENT_SITE )