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Introduce is_main_network(). 

By default, a network ID of 1 is assumed to be the main network.
Otherwise, it is the first network listed in the wp_site table.

If PRIMARY_NETWORK_ID is defined, it is considered main network.

props jeremyfelt.
see #25030.

Built from https://develop.svn.wordpress.org/trunk@25147


git-svn-id: http://core.svn.wordpress.org/trunk@25126 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Andrew Nacin 2013-08-28 03:35:08 +00:00
parent 8a50bf2f14
commit 4d6d80a14f
1 changed files with 45 additions and 9 deletions
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54
wp-includes/functions.php
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@ -3246,25 +3246,61 @@ function wp_suspend_cache_invalidation($suspend = true) {
} }
/** /**
* Is main site? * Whether a site is the main site of the current network.
*
* *
* @since 3.0.0 * @since 3.0.0
* @package WordPress
* *
* @param int $blog_id optional blog id to test (default current blog) * @param int $site_id Optional. Site ID to test. Defaults to current site.
* @return bool True if not multisite or $blog_id is main site * @return bool True if $site_id is the main site of the network, or if not running multisite.
*/ */
function is_main_site( $blog_id = '' ) { function is_main_site( $site_id = null ) {
// This is the current network's information; 'site' is old terminology.
global $current_site; global $current_site;
if ( ! is_multisite() ) if ( ! is_multisite() )
return true; return true;
if ( ! $blog_id ) if ( ! $site_id )
$blog_id = get_current_blog_id(); $site_id = get_current_blog_id();
return $blog_id == $current_site->blog_id; return (int) $site_id === (int) $current_site->blog_id;
}
/**
* Whether a network is the main network of the multisite install.
*
* @since 3.7.0
*
* @param int $network_id Optional. Network ID to test. Defaults to current network.
* @return bool True if $network_id is the main network, or if not running multisite.
*/
function is_main_network( $network_id = null ) {
global $current_site, $wpdb;
$current_network_id = (int) $current_site->id;
if ( ! is_multisite() )
return true;
if ( ! $network_id )
$network_id = $current_network_id;
$network_id = (int) $network_id;
if ( defined( 'PRIMARY_NETWORK_ID' ) )
return $network_id === (int) PRIMARY_NETWORK_ID;
if ( 1 === $current_network_id )
return $network_id === $current_network_id;
$primary_network_id = (int) wp_cache_get( 'primary_network_id', 'site-options' );
if ( $primary_network_id )
return $network_id === $primary_network_id;
$primary_network_id = (int) $wpdb->get_var( "SELECT id FROM $wpdb->site ORDER BY id LIMIT 1" );
wp_cache_add( 'primary_network_id', $primary_network_id, 'site-options' );
return $network_id === $primary_network_id;
} }
/** /**