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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 |
|---|---|
| 461 | /** |
| 462 | * Fires immediately after a site has been removed from the object cache. |
| 463 | * |
| 464 | * @since 4.6.0 |
| 465 | * |
| 466 | * @param int $id Blog ID. |
| 467 | * @param WP_Site $blog Site object. |
| 468 | * @param string $domain_path_key md5 hash of domain and path. |
| 469 | */ |
| 470 | do_action( 'clean_site_cache', $blog_id, $blog, $domain_path_key ); |
| 471 | |
| 472 | wp_cache_set( 'last_changed', microtime(), 'sites' ); |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * Retrieves site data given a site ID or site object. |
| 477 | * |
| 478 | * Site data will be cached and returned after being passed through a filter. |
| 479 | * If the provided site is empty, the current site global will be used. |