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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 |
---|---|
1095 | * fail to authenticate or match to a registered route. |
1096 | * |
1097 | * @since 4.7.0 |
1098 | * |
1099 | * @param WP_REST_Response|WP_HTTP_Response|WP_Error|mixed $response Result to send to the client. |
1100 | * Usually a WP_REST_Response or WP_Error. |
1101 | * @param array $handler Route handler used for the request. |
1102 | * @param WP_REST_Request $request Request used to generate the response. |
1103 | */ |
1104 | $response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request ); |
1105 |
|
1106 | // Check permission specified on the route. |
1107 | if ( ! is_wp_error( $response ) && ! empty( $handler['permission_callback'] ) ) { |
1108 | $permission = call_user_func( $handler['permission_callback'], $request ); |
1109 |
|
1110 | if ( is_wp_error( $permission ) ) { |
1111 | $response = $permission; |
1112 | } elseif ( false === $permission || null === $permission ) { |
1113 | $response = new WP_Error( |