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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 |
|---|---|
| 892 | * |
| 893 | * @since 4.4.0 |
| 894 | * @since 4.5.0 Added `$route` and `$handler` parameters. |
| 895 | * |
| 896 | * @param bool $dispatch_result Dispatch result, will be used if not empty. |
| 897 | * @param WP_REST_Request $request Request used to generate the response. |
| 898 | * @param string $route Route matched for the request. |
| 899 | * @param array $handler Route handler used for the request. |
| 900 | */ |
| 901 | $dispatch_result = apply_filters( 'rest_dispatch_request', null, $request, $route, $handler ); |
| 902 | |
| 903 | // Allow plugins to halt the request via this filter. |
| 904 | if ( null !== $dispatch_result ) { |
| 905 | $response = $dispatch_result; |
| 906 | } else { |
| 907 | $response = call_user_func( $callback, $request ); |
| 908 | } |
| 909 | } |
| 910 | |