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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 |
|---|---|
| 338 | * Fires after a single attachment is created or updated via the REST API. |
| 339 | * |
| 340 | * @since 4.7.0 |
| 341 | * |
| 342 | * @param WP_Post $attachment Inserted or updated attachment |
| 343 | * object. |
| 344 | * @param WP_REST_Request $request The request sent to the API. |
| 345 | * @param bool $creating True when creating an attachment, false when updating. |
| 346 | */ |
| 347 | do_action( 'rest_insert_attachment', $attachment, $request, true ); |
| 348 | |
| 349 | return array( |
| 350 | 'attachment_id' => $id, |
| 351 | 'file' => $file, |
| 352 | ); |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Determines the featured media based on a request param. |