mt-rest-cache-test.php

<?php

/*
Plugin Name: MT REST Cache Test
Plugin URI: http://localhost
Description: MT REST Cache Test
Version: 1.0
Author: mighty_mt
Author URI: http://localhost
Licence: GPLv3
*/

/**
 * This is our callback function that embeds our phrase in a WP_REST_Response
 */
function mtrct_get_endpoint_phrase() {
    $response = array(
        "type" => "FeatureCollection",
        "features" => array(
            array(
                "type" => "Feature",
                "geometry" => array(
                    "type" => "Point",
                    "coordinates" => array(
                        "16.37313723564148",
                        "48.20847346029796"
                    ),
                ),
                "properties" => array(
                    "name" => "Stephansdom",
                ),
            ),
        ),
    );
    
    return new WP_REST_Response( $response, 200 );
}
 
/**
 * This function is where we register our routes for our example endpoint.
 */
function mtrct_register_example_routes() {
    // register_rest_route() handles more arguments but we are going to stick to the basics for now.
    register_rest_route( 'mtrct/v1', '/test', array(
        // By using this constant we ensure that when the WP_REST_Server changes our readable endpoints will work as intended.
        'methods'  => WP_REST_Server::READABLE,
        // Here we register our callback. The callback is fired when this endpoint is matched by the WP_REST_Server class.
        'callback' => 'mtrct_get_endpoint_phrase',
    ) );
}
 
add_action( 'rest_api_init', 'mtrct_register_example_routes' );

/**
 * Register the /wp-json/acf/v3/posts endpoint so it will be cached.
 */
function mtrct_add_acf_posts_endpoint( $allowed_endpoints ) {
    if ( ! isset( $allowed_endpoints[ 'mtrct/v1' ] ) || ! in_array( 'test', $allowed_endpoints[ 'mtrct/v1' ] ) ) {
        $allowed_endpoints[ 'mtrct/v1' ][] = 'test';
    }
    return $allowed_endpoints;
}

add_filter( 'wp_rest_cache/allowed_endpoints', 'mtrct_add_acf_posts_endpoint', 10, 1 );