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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 975 | /** |
| 976 | * Fires immediately after a site has been removed from the object cache. |
| 977 | * |
| 978 | * @since 4.6.0 |
| 979 | * |
| 980 | * @param string $id Site ID as a numeric string. |
| 981 | * @param WP_Site $blog Site object. |
| 982 | * @param string $domain_path_key md5 hash of domain and path. |
| 983 | */ |
| 984 | do_action( 'clean_site_cache', $blog_id, $blog, $domain_path_key ); |
| 985 | |
| 986 | wp_cache_set( 'last_changed', microtime(), 'sites' ); |
| 987 | |
| 988 | /** |
| 989 | * Fires after the blog details cache is cleared. |
| 990 | * |
| 991 | * @since 3.4.0 |
| 992 | * @deprecated 4.9.0 Use {@see 'clean_site_cache'} instead. |
| 993 | * |