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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 |
|---|---|
| 47 | |
| 48 | /** |
| 49 | * Fires after the site options are updated. |
| 50 | * |
| 51 | * @since 3.0.0 |
| 52 | * @since 4.4.0 Added `$id` parameter. |
| 53 | * |
| 54 | * @param int $id The ID of the site being updated. |
| 55 | */ |
| 56 | do_action( 'wpmu_update_blog_options', $id ); |
| 57 | |
| 58 | restore_current_blog(); |
| 59 | wp_redirect( add_query_arg( array( 'update' => 'updated', 'id' => $id ), 'site-settings.php') ); |
| 60 | exit; |
| 61 | } |
| 62 | |
| 63 | if ( isset($_GET['update']) ) { |
| 64 | $messages = array(); |
| 65 | if ( 'updated' == $_GET['update'] ) |