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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 |
|---|---|
| 56 | if ( $key === 0 || is_array( $val ) || in_array($key, $skip_options) ) |
| 57 | continue; // Avoids "0 is a protected WP option and may not be modified" error when edit blog options |
| 58 | if ( $c == $count ) |
| 59 | update_option( $key, stripslashes( $val ) ); |
| 60 | else |
| 61 | update_option( $key, stripslashes( $val ), false ); // no need to refresh blog details yet |
| 62 | $c++; |
| 63 | } |
| 64 | |
| 65 | do_action( 'wpmu_update_blog_options' ); |
| 66 | restore_current_blog(); |
| 67 | wp_redirect( add_query_arg( array( 'update' => 'updated', 'id' => $id ), 'site-settings.php') ); |
| 68 | exit; |
| 69 | } |
| 70 | |
| 71 | if ( isset($_GET['update']) ) { |
| 72 | $messages = array(); |
| 73 | if ( 'updated' == $_GET['update'] ) |
| 74 | $messages[] = __('Site options updated.'); |