wp_is_site_initialized( int|WP_Site $site_id )
Checks whether a site is initialized.
Description
A site is considered initialized when its database tables are present.
Parameters
- $site_id
-
(Required) Site ID or object.
Return
(bool) True if the site is initialized, false otherwise.
Source
File: wp-includes/ms-site.php
function wp_is_site_initialized( $site_id ) {
global $wpdb;
if ( is_object( $site_id ) ) {
$site_id = $site_id->blog_id;
}
$site_id = (int) $site_id;
/**
* Filters the check for whether a site is initialized before the database is accessed.
*
* Returning a non-null value will effectively short-circuit the function, returning
* that value instead.
*
* @since 5.1.0
*
* @param bool|null $pre The value to return instead. Default null
* to continue with the check.
* @param int $site_id The site ID that is being checked.
*/
$pre = apply_filters( 'pre_wp_is_site_initialized', null, $site_id );
if ( null !== $pre ) {
return (bool) $pre;
}
$switch = false;
if ( get_current_blog_id() !== $site_id ) {
$switch = true;
remove_action( 'switch_blog', 'wp_switch_roles_and_user', 1 );
switch_to_blog( $site_id );
}
$suppress = $wpdb->suppress_errors();
$result = (bool) $wpdb->get_results( "DESCRIBE {$wpdb->posts}" );
$wpdb->suppress_errors( $suppress );
if ( $switch ) {
restore_current_blog();
add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );
}
return $result;
}
Changelog
Version | Description |
---|---|
5.1.0 | Introduced. |