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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 |
|---|---|
| 1047 | * |
| 1048 | * This contains the data describing the API. This includes information |
| 1049 | * about supported authentication schemes, supported namespaces, routes |
| 1050 | * available on the API, and a small amount of data about the site. |
| 1051 | * |
| 1052 | * @since 4.4.0 |
| 1053 | * |
| 1054 | * @param WP_REST_Response $response Response data. |
| 1055 | */ |
| 1056 | return apply_filters( 'rest_index', $response ); |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * Retrieves the index for a namespace. |
| 1061 | * |
| 1062 | * @since 4.4.0 |
| 1063 | * |
| 1064 | * @param WP_REST_Request $request REST request instance. |
| 1065 | * @return WP_REST_Response|WP_Error WP_REST_Response instance if the index was found, |