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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 |
|---|---|
| 3621 | return false; |
| 3622 | $cache_key = "{$wpdb->siteid}:$option"; |
| 3623 | wp_cache_delete( $cache_key, 'site-options' ); |
| 3624 | |
| 3625 | $result = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) ); |
| 3626 | } |
| 3627 | |
| 3628 | if ( $result ) { |
| 3629 | do_action( "delete_site_option_{$option}", $option ); |
| 3630 | do_action( "delete_site_option", $option ); |
| 3631 | return true; |
| 3632 | } |
| 3633 | return false; |
| 3634 | } |
| 3635 | |
| 3636 | /** |
| 3637 | * Update the value of a site option that was already added. |
| 3638 | * |
| 3639 | * @see update_option() |