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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 |
|---|---|
| 52 | $skip_options = array( 'allowedthemes' ); // Don't update these options since they are handled elsewhere in the form. |
| 53 | foreach ( (array) $_POST['option'] as $key => $val ) { |
| 54 | $key = wp_unslash( $key ); |
| 55 | $val = wp_unslash( $val ); |
| 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 | update_option( $key, $val ); |
| 59 | } |
| 60 | |
| 61 | do_action( 'wpmu_update_blog_options' ); |
| 62 | restore_current_blog(); |
| 63 | wp_redirect( add_query_arg( array( 'update' => 'updated', 'id' => $id ), 'site-settings.php') ); |
| 64 | exit; |
| 65 | } |
| 66 | |
| 67 | if ( isset($_GET['update']) ) { |
| 68 | $messages = array(); |
| 69 | if ( 'updated' == $_GET['update'] ) |
| 70 | $messages[] = __('Site options updated.'); |