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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 |
|---|---|
| 3979 | wp_cache_set( $cache_key, $value, 'site-options' ); |
| 3980 | |
| 3981 | $_value = $value; |
| 3982 | $value = maybe_serialize( $value ); |
| 3983 | $result = $wpdb->update( $wpdb->sitemeta, array( 'meta_value' => $value ), array( 'site_id' => $wpdb->siteid, 'meta_key' => $option ) ); |
| 3984 | $value = $_value; |
| 3985 | } |
| 3986 | |
| 3987 | if ( $result ) { |
| 3988 | do_action( "update_site_option_{$option}", $option, $value, $oldvalue ); |
| 3989 | do_action( "update_site_option", $option, $value, $oldvalue ); |
| 3990 | return true; |
| 3991 | } |
| 3992 | return false; |
| 3993 | } |
| 3994 | |
| 3995 | /** |
| 3996 | * Delete a site transient. |
| 3997 | * |