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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 |
|---|---|
| 228 | * Filter a specific, non-default site-updated message in the Network admin. |
| 229 | * |
| 230 | * The dynamic portion of the hook name, `$_GET['updated']`, refers to the |
| 231 | * non-default site update action. |
| 232 | * |
| 233 | * @since 3.1.0 |
| 234 | * |
| 235 | * @param string $msg The update message. Default 'Settings saved'. |
| 236 | */ |
| 237 | $msg = apply_filters( 'network_sites_updated_message_' . $_GET['updated'], __( 'Settings saved.' ) ); |
| 238 | break; |
| 239 | } |
| 240 | |
| 241 | if ( ! empty( $msg ) ) |
| 242 | $msg = '<div class="updated" id="message"><p>' . $msg . '</p></div>'; |
| 243 | } |
| 244 | |
| 245 | $wp_list_table->prepare_items(); |
| 246 | |