get_blog_id_from_url( string $domain, string $path = '/' ): int
- Since
- MU (3.0.0)
- Source
wp-includes/ms-functions.php:350
Gets a blog's numeric ID from its URL.
Description
On a subdirectory installation like example.com/blog1/, $domain will be the root 'example.com' and $path the subdirectory '/blog1/'. With subdomains like blog1.example.com, $domain is 'blog1.example.com' and $path is '/'.
Parameters
$domainstring- Website domain.
$pathstringoptional- Not required for subdomain installations. Default '/'.Default:
'/'
Return
int- 0 if no blog found, otherwise the ID of the matching blog.
Uses · 3
- wp_cache_get()Retrieves the cache contents from the cache by key and group.
- get_sites()Retrieves a list of sites matching requested arguments.
- wp_cache_set()Saves the data to the cache.
Source
function get_blog_id_from_url( $domain, $path = '/' ) { $domain = strtolower( $domain ); $path = strtolower( $path ); $id = wp_cache_get( md5( $domain . $path ), 'blog-id-cache' ); if ( -1 === $id ) { // Blog does not exist. return 0; } elseif ( $id ) { return (int) $id; } $args = array( 'domain' => $domain, 'path' => $path, 'fields' => 'ids', 'number' => 1, 'update_site_meta_cache' => false, ); $result = get_sites( $args ); $id = array_shift( $result ); if ( ! $id ) { wp_cache_set( md5( $domain . $path ), -1, 'blog-id-cache' ); return 0; } wp_cache_set( md5( $domain . $path ), $id, 'blog-id-cache' ); return $id;}History
Introduced in MU (3.0.0). Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
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src/wp-includes/ms-functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
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