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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 |
|---|---|
| 316 | * Fires after a single attachment is created or updated via the REST API. |
| 317 | * |
| 318 | * @since 4.7.0 |
| 319 | * |
| 320 | * @param WP_Post $attachment Inserted or updated attachment |
| 321 | * object. |
| 322 | * @param WP_REST_Request $request The request sent to the API. |
| 323 | * @param bool $creating True when creating an attachment, false when updating. |
| 324 | */ |
| 325 | do_action( 'rest_insert_attachment', $attachment, $request, true ); |
| 326 | |
| 327 | return array( |
| 328 | 'attachment_id' => $id, |
| 329 | 'file' => $file, |
| 330 | ); |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * Determines the featured media based on a request param. |