wp_is_serving_rest_request()WP 6.5.0

Determines whether WordPress is currently serving a REST API request.

The function relies on the 'REST_REQUEST' global. As such, it only returns true when an actual REST _request_ is being made. It does not return true when a REST endpoint is hit as part of another request, e.g. for preloading a REST response. See wp_is_rest_endpoint() for that purpose.

This function should not be called until the parse_request action, as the constant is only defined then, even for an actual REST request.

No Hooks.

Return

true|false. True if it's a WordPress REST API request, false otherwise.

Usage

wp_is_serving_rest_request();

Changelog

Since 6.5.0 Introduced.

wp_is_serving_rest_request() code WP 6.5.4

function wp_is_serving_rest_request() {
	return defined( 'REST_REQUEST' ) && REST_REQUEST;
}