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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 |
|---|---|
| 347 | /** |
| 348 | * Fires for a given custom post action request. |
| 349 | * |
| 350 | * The dynamic portion of the hook name, `$action`, refers to the custom post action. |
| 351 | * |
| 352 | * @since 4.6.0 |
| 353 | * |
| 354 | * @param int $post_id Post ID sent with the request. |
| 355 | */ |
| 356 | do_action( "post_action_{$action}", $post_id ); |
| 357 | |
| 358 | wp_redirect( admin_url( 'edit.php' ) ); |
| 359 | exit(); |
| 360 | } // End switch. |
| 361 | |
| 362 | require_once ABSPATH . 'wp-admin/admin-footer.php'; |
| 363 | |