get_blog_id_from_url( string $domain, string $path = '/' )
Get 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
- $domain
-
(Required)
- $path
-
(Optional) Not required for subdomain installations.
Default value: '/'
Return
(int) 0 if no blog found, otherwise the ID of the matching blog
Source
File: wp-includes/ms-functions.php
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 ( $id == -1 ) // blog does not exist
return 0;
elseif ( $id )
return (int) $id;
$args = array(
'domain' => $domain,
'path' => $path,
'fields' => 'ids',
'number' => 1,
);
$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;
}
Changelog
| Version | Description |
|---|---|
| WP-MU | Introduced. (3.0.0) |