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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 |
|---|---|
| 384 | * |
| 385 | * By default, custom post types use the messages for the 'post' post type. |
| 386 | * |
| 387 | * @since 3.7.0 |
| 388 | * |
| 389 | * @param array[] $bulk_messages Arrays of messages, each keyed by the corresponding post type. Messages are |
| 390 | * keyed with 'updated', 'locked', 'deleted', 'trashed', and 'untrashed'. |
| 391 | * @param int[] $bulk_counts Array of item counts for each message, used to build internationalized strings. |
| 392 | */ |
| 393 | $bulk_messages = apply_filters( 'bulk_post_updated_messages', $bulk_messages, $bulk_counts ); |
| 394 | $bulk_counts = array_filter( $bulk_counts ); |
| 395 | |
| 396 | require_once ABSPATH . 'wp-admin/admin-header.php'; |
| 397 | ?> |
| 398 | <div class="wrap"> |
| 399 | <h1 class="wp-heading-inline"> |
| 400 | <?php |
| 401 | echo esc_html( $post_type_object->labels->name ); |
| 402 | ?> |