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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 |
|---|---|
| 415 | /** |
| 416 | * Filters the arguments for registering a post type. |
| 417 | * |
| 418 | * @since 4.4.0 |
| 419 | * |
| 420 | * @param array $args Array of arguments for registering a post type. |
| 421 | * See the register_post_type() function for accepted arguments. |
| 422 | * @param string $post_type Post type key. |
| 423 | */ |
| 424 | $args = apply_filters( 'register_post_type_args', $args, $this->name ); |
| 425 | |
| 426 | $has_edit_link = ! empty( $args['_edit_link'] ); |
| 427 | |
| 428 | // Args prefixed with an underscore are reserved for internal use. |
| 429 | $defaults = array( |
| 430 | 'labels' => array(), |
| 431 | 'description' => '', |
| 432 | 'public' => false, |
| 433 | 'hierarchical' => false, |