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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 |
|---|---|
| 99 | $value = wp_unslash( $_POST[$option_name] ); |
| 100 | update_site_option( $option_name, $value ); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Fires after the network options are updated. |
| 105 | * |
| 106 | * @since MU |
| 107 | */ |
| 108 | do_action( 'update_wpmu_options' ); |
| 109 | |
| 110 | wp_redirect( add_query_arg( 'updated', 'true', network_admin_url( 'settings.php' ) ) ); |
| 111 | exit(); |
| 112 | } |
| 113 | |
| 114 | include( ABSPATH . 'wp-admin/admin-header.php' ); |
| 115 | |
| 116 | if ( isset( $_GET['updated'] ) ) { |
| 117 | ?><div id="message" class="updated notice is-dismissible"><p><?php _e( 'Options saved.' ) ?></p></div><?php |