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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 |
---|---|
61 |
|
62 | /** |
63 | * Fires after the site options are updated. |
64 | * |
65 | * @since 3.0.0 |
66 | * @since 4.4.0 Added `$id` parameter. |
67 | * |
68 | * @param int $id The ID of the site being updated. |
69 | */ |
70 | do_action( 'wpmu_update_blog_options', $id ); |
71 |
|
72 | restore_current_blog(); |
73 | wp_redirect( add_query_arg( array( 'update' => 'updated', 'id' => $id ), 'site-settings.php') ); |
74 | exit; |
75 | } |
76 |
|
77 | if ( isset($_GET['update']) ) { |
78 | $messages = array(); |
79 | if ( 'updated' == $_GET['update'] ) |