get_id_from_blogname() – Function | Developer.WordPress.org

Retrieves a site’s ID given its (subdomain or directory) slug.

Parameters

$slugstringrequired: A site’s slug.

Return

int|null The site ID, or null if no site is found for the given slug.

Source

function get_id_from_blogname( $slug ) {
	$current_network = get_network();
	$slug            = trim( $slug, '/' );

	if ( is_subdomain_install() ) {
		$domain = $slug . '.' . preg_replace( '|^www\.|', '', $current_network->domain );
		$path   = $current_network->path;
	} else {
		$domain = $current_network->domain;
		$path   = $current_network->path . $slug . '/';
	}

	$site_ids = get_sites(
		array(
			'number'                 => 1,
			'fields'                 => 'ids',
			'domain'                 => $domain,
			'path'                   => $path,
			'update_site_meta_cache' => false,
		)
	);

	if ( empty( $site_ids ) ) {
		return null;
	}

	return array_shift( $site_ids );
}

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Uses	Description
get_network()`wp-includes/ms-network.php`	Retrieves network data given a network ID or network object.
get_sites()`wp-includes/ms-site.php`	Retrieves a list of sites matching requested arguments.
is_subdomain_install()`wp-includes/ms-load.php`	Whether a subdomain configuration is enabled.

Used by	Description
avoid_blog_page_permalink_collision()`wp-admin/includes/ms.php`	Avoids a collision between a site slug and a permalink slug.
get_blog_details()`wp-includes/ms-blogs.php`	Retrieves the details for a blog from the blogs table and blog options.

Changelog

Version	Description
MU (3.0.0)	MU (3.0.0)
4.7.0	Introduced.

User Contributed Notes

Skip to note 2 content

Codex 9 years ago

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Getting id of a blog by name ($slug)
```
$slug = 'first-site';
$id = get_id_from_blogname( $slug );
```
Switching blogs based on the blogs name ($slug)
```
$slug = 'another-site';
$id = get_id_from_blogname( $slug );
switch_to_blog( $id );

// Do great things.
restore_current_blog();
```
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get_id_from_blogname( string $slug ): int|null

In this article

Parameters

Return

Source

Changelog

User Contributed Notes

get_id_from_blogname( string $slug ): int|null

In this article

Parameters

Return

Source

Related

Changelog

User Contributed Notes