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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 |
|---|---|
| 609 | * Fires when preparing to serve a REST API request. |
| 610 | * |
| 611 | * Endpoint objects should be created and register their hooks on this action rather |
| 612 | * than another action to ensure they're only loaded when needed. |
| 613 | * |
| 614 | * @since 4.4.0 |
| 615 | * |
| 616 | * @param WP_REST_Server $wp_rest_server Server object. |
| 617 | */ |
| 618 | do_action( 'rest_api_init', $wp_rest_server ); |
| 619 | } |
| 620 | |
| 621 | return $wp_rest_server; |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * Ensures request arguments are a request object (for consistency). |
| 626 | * |
| 627 | * @since 4.4.0 |