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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 |
|---|---|
| 367 | * |
| 368 | * @since 4.4.0 |
| 369 | * |
| 370 | * @param bool $served Whether the request has already been served. |
| 371 | * Default false. |
| 372 | * @param WP_HTTP_Response $result Result to send to the client. Usually a WP_REST_Response. |
| 373 | * @param WP_REST_Request $request Request used to generate the response. |
| 374 | * @param WP_REST_Server $this Server instance. |
| 375 | */ |
| 376 | $served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this ); |
| 377 | |
| 378 | if ( ! $served ) { |
| 379 | if ( 'HEAD' === $request->get_method() ) { |
| 380 | return null; |
| 381 | } |
| 382 | |
| 383 | // Embed links inside the request. |
| 384 | $result = $this->response_to_data( $result, isset( $_GET['_embed'] ) ); |
| 385 | |