EDIT: <根据@TimHallman的回答，我有一个后续问题，请看这篇文章的底部

我正试图做一些超出我头脑的事情，我想得越多，我最终会遇到越多的问题。

这就是我的情况：

类型的自定义帖子golfcourse, 每个人都有一个高尔夫球场clubnews.clubnewsowner 与他们相关我所做的是（使用自制的短代码）在每个高尔夫球场帖子上检查是否存在一个或多个clubnews类型的帖子，其分类与特定高尔夫球场相关。如果是，请在高尔夫球场帖子上显示俱乐部新闻帖子。

这是我想要的。

然而，我确实在这个网站上使用了WP Rocket缓存插件。而且，由于clubnews帖子（到golfcourse帖子）仅使用php（无ajax）添加，所以每当添加、更新或删除clubnews帖子时，WP Rocket都不知道golfcourse帖子上的内容发生了变化。这意味着每当出现上述场景时，我需要手动清除相关的golfcourse帖子。

幸运的是，WP Rocket具有以下功能：

//clean post with ID 5
rocket_clean_post( 5 );

我成功地创建了一些伪代码：

function clearPageCacheBasedOnTaxOfClubnews() {
    if ( ( clubnews is created ) || ( clubnews is updated )  || ( clubnews is deleted ) ) {

        $customPost = clubnewsPostID;

        // The result here is always only one taxonomy
        $taxonomyOfCustompPost = get_post_taxonomies( $customPost );

        switch ($taxonomyOfCustompPost) {
            case \'golfcourseOne\': rocket_clean_post( 5 );
            break;
            case \'golfcourseTwo\': rocket_clean_post( 8 );
            break;
        }
    }
}
add_action( \'when?\', \'clearPageCacheBasedOnTaxOfClubnews\', 10, ?);

我认为上面的代码可以工作，但这里有很多事情我不确定：

如何获取正在创建/更新/删除的clubnews帖子的ID

<小时>

Follow-up question:

我相信@TimHallman用下面的答案至少解决了三分之二的问题（当clubnews自定义帖子被删除时，我需要另一个动作）。

一、 然而，我们无法做到这一点。我的代码生成一个白色的死亡屏幕，不会生成任何php错误。我认为发生的是，当清除单个帖子上的缓存时，WP Rocket使用了服务器上的所有资源。不过我不确定。

代码如下：

add_action( \'save_post\', \'clearPageCacheBasedOnTaxOfClubnews\');


function clearPageCacheBasedOnTaxOfClubnews($post_id) {

    /* Is has_term() used correctly here? In the codex it says that the
     * taxonomy parameter is optional, other places on the Internet claims
     * the opposite...
     */
    if ( has_term(\'clubnewsowner\', \'\', $post_id ) {

        // The result here is always only one taxonomy
        $taxonomyOfCustompPost = get_post_taxonomies( $post_id );

        /* The codex says get_post_taxonomies() returns an array. The code
         * on the line below produces a php fatal error though.
         */
        $taxonomyOfCustompPost = $taxonomyOfCustompPost[0];

        /* This is where the connection between the taxonomy of the
         * Clubnews custom posts and the golf course pages happens
         */
        switch ($taxonomyOfCustompPost){
            case \'Course One\': $courseID = 123; break;
            case \'Course Two\': $courseID = 234; break;
            case \'Course Three\': $courseID = 345; break;
            ...
        }

        //This cleans the cache of the selected post
        rocket_clean_post( $courseID );
    }
}

我曾在不同的变体中尝试过这一点，但要么因为$taxonomyofcustompost=taxonomyofcustompost[0]而出现致命错误；或者我会得到一个完全没有php错误的白色死亡屏幕。

你有什么建议吗？

function clear_rocket_cache_on_post_save() {
     rocket_clean_domain();
}
add_action( \'save_post\', \'clear_rocket_cache_on_post_save\' );

  function clear_rocket_cache_on_post_save( $post_id ) {

       // $result_id = tax query by $post_id
       rocket_clean_post( $result_id );

  }
  add_action( \'save_post\', \'clear_rocket_cache_on_post_save\' );

if (!function_exists(\'write_log\')) {
    function write_log ( $log )  {
        if ( true === WP_DEBUG ) {
            if ( is_array( $log ) || is_object( $log ) ) {
                error_log( print_r( $log, true ) );
            } else {
                error_log( $log );
            }
        }
    }
}

define( \'WP_DEBUG\', true);
define( \'WP_DEBUG_DISPLAY\', false );
define( \'WP_DEBUG_LOG\', true );

// Run the function when a post is created or updated
add_action( \'save_post\', \'clearPageCacheBasedOnTaxOfClubnews\');
function clearPageCacheBasedOnTaxOfClubnews($post_id) {

    $taxonomyOfCustompPost = get_post_taxonomies( $post_id );
    // In this special case, there is always only one taxonomy!
    $taxCustompPost = $taxonomyOfCustompPost[0];

    if ( $taxCustompPost != \'clubnewsowner\' ) {
        return;
    }

    if ( $taxCustompPost == \'clubnewsowner\' ) {
        $terms = wp_get_post_terms( $post_id, \'clubnewsowner\', array("fields" => "names"));
        $term = $terms[0];;

        switch ($term){
            case \'Course One\': $courseID = 123; break;
            case \'Course Two\': $courseID = 456; break;
            case \'Course Three\': $courseID = 789; break;
            ...
        }

        rocket_clean_post( $courseID );


    }
}

//Run the function when the post is deleted
add_action(\'trash_post\',\'clearPageCacheWhenCPDeleted\',1,1);
function clearPageCacheWhenCPDeleted($post_id){

    if(!did_action(\'trash_post\')){

        $taxonomyOfCustompPost = get_post_taxonomies( $post_id );
        // In this special case, there is always only one taxonomy!
        $taxCustompPost = $taxonomyOfCustompPost[0];

        if ( $taxCustompPost != \'clubnewsowner\' ) {
            return;
        }

        if ( $taxCustompPost == \'clubnewsowner\' ) {

            $terms = wp_get_post_terms( $post_id, \'clubnewsowner\', array("fields" => "names"));
            $term = $terms[0];;

            switch ($term){
                case \'Course One\': $courseID = 123; break;
                case \'Course Two\': $courseID = 456; break;
                case \'Course Three\': $courseID = 789; break;
            }

            rocket_clean_post( $courseID );

        }
    }
}