WP_Network::get_main_site_id

Advertisement

Private Access Private Access

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Summery Summery

Returns the main site ID for the network.

Syntax Syntax

WP_Network::get_main_site_id()

Description Description

Internal method used by the magic getter for the ‘blog_id’ and ‘site_id’ properties.

Return Return

(int) The ID of the main site.

Source Source

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

	private function get_main_site_id() {
		/**
		 * 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' ) && DOMAIN_CURRENT_SITE === $this->domain && PATH_CURRENT_SITE === $this->path )
			|| ( defined( 'SITE_ID_CURRENT_SITE' ) && SITE_ID_CURRENT_SITE == $this->id ) ) {
			if ( defined( 'BLOG_ID_CURRENT_SITE' ) ) {
				$this->blog_id = (string) BLOG_ID_CURRENT_SITE;

				return (int) $this->blog_id;
			}

			if ( defined( 'BLOGID_CURRENT_SITE' ) ) { // Deprecated.
				$this->blog_id = (string) BLOGID_CURRENT_SITE;

				return (int) $this->blog_id;
			}
		}

		$site = get_site();
		if ( $site->domain === $this->domain && $site->path === $this->path ) {
			$main_site_id = (int) $site->id;
		} else {
			$cache_key = 'network:' . $this->id . ':main_site';

			$main_site_id = wp_cache_get( $cache_key, 'site-options' );
			if ( false === $main_site_id ) {
				$_sites       = get_sites(
					array(
						'fields'     => 'ids',
						'number'     => 1,
						'domain'     => $this->domain,
						'path'       => $this->path,
						'network_id' => $this->id,
					)
				);
				$main_site_id = ! empty( $_sites ) ? array_shift( $_sites ) : 0;

				wp_cache_add( $cache_key, $main_site_id, 'site-options' );
			}
		}

		$this->blog_id = (string) $main_site_id;

		return (int) $this->blog_id;
	}

Advertisement

Changelog Changelog

Changelog
Version Description
4.9.0 Introduced.

Advertisement

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.