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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 |
|---|---|
| 552 | * Fires when preparing to serve a REST API request. |
| 553 | * |
| 554 | * Endpoint objects should be created and register their hooks on this action rather |
| 555 | * than another action to ensure they're only loaded when needed. |
| 556 | * |
| 557 | * @since 4.4.0 |
| 558 | * |
| 559 | * @param WP_REST_Server $wp_rest_server Server object. |
| 560 | */ |
| 561 | do_action( 'rest_api_init', $wp_rest_server ); |
| 562 | } |
| 563 | |
| 564 | return $wp_rest_server; |
| 565 | } |
| 566 | |
| 567 | /** |
| 568 | * Ensures request arguments are a request object (for consistency). |
| 569 | * |
| 570 | * @since 4.4.0 |