我正在尝试为我的一个站点创建自定义端点，以便将ACF字段拉入另一个站点。我的主题函数中有以下代码。php

// register the endpoints needed
add_action( \'rest_api_init\', function( ) {

    /*
    // post types to include
    $_pts = array( \'posts\', );


    // loop the post types and create a rest endpoint for the ACF fields for them
    foreach ( $_pts as $_pt ) {

        // var_dump($_pt . \'/acf\');

        // register the rest endpoint
        register_rest_route( \'kp-api/v1\', $_pt . \'/acf/(?P<id>\\d+)\', array(
            \'methods\' => array( \'GET\', ),
            \'get_callback\' => function( $data ) {
                return \'HERE\';
            },
            \'args\' => array(
                \'id\' => array( \'validate_callback\' => function( $param, $request, $key ) {
                    return is_numeric( $param );
                } ),
            ),
        ) );
    }
    */

    // register the rest endpoint
    register_rest_route( \'kp-api/v1\', \'/TEST/(?P<id>\\d+)\', array(
        \'methods\' => array( \'GET\', ),
        \'get_callback\' => function( $data ) {
            return \'HERE\';
        },
        \'args\' => array(
            \'id\' => array( \'validate_callback\' => function( $param, $request, $key ) {
                return is_numeric( $param );
            } ),
        ),
    ) );

} );

当我尝试浏览我的端点时，我最终得到{"code":"rest_no_route","message":"No route was found matching the URL and request method","data":{"status":404}}

而且，我在站点的/wp-json/中看不到端点。然而，我可以看到，至少名称空间本身确实是通过浏览创建的：/wp-json/kp-api/v1

但是，其中没有端点。

{
  "namespace": "kp-api/v1",
  "routes": {
    "/kp-api/v1": {
      "namespace": "kp-api/v1",
      "methods": [
    "GET"
      ],
      "endpoints": [
    {
      "methods": [
        "GET"
      ],
      "args": {
        "namespace": {
          "required": false,
          "default": "kp-api/v1"
        },
        "context": {
          "required": false,
          "default": "view"
        }
      }
    }
      ],
      "_links": {
    "self": "https://example.com/wp-json/kp-api/v1"
      }
    }
  },
  "_links": {
    "up": [
      {
    "href": "https://example.com/wp-json/"
      }
    ]
  }
}

我做错了什么？不，我没有使用wp json插件，只是使用了正常的内置Wordpress功能（v.5.3.2）