8 views 
Summery Summery
Get a blog’s numeric ID from its URL.
Syntax Syntax
Description 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 Parameters
- $domain
-
(Required)
- $path
-
(Optional) Not required for subdomain installations.
Default value: '/'
Return Return
(int) 0 if no blog found, otherwise the ID of the matching blog
Source Source
File: wp-includes/ms-functions.php
* @param string $path Optional. Not required for subdomain installations.
* @return int 0 if no blog found, otherwise the ID of the matching blog
*/
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' );
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Changelog Changelog
| Version | Description |
|---|---|
| MU (3.0.0) | Introduced. |