我在函数中创建了一个自定义函数。php检查post\\u是否在\\u substant\\u类别中，我通过一个插件控制它，该插件返回true is a post is in substant类别，it is working well

But it\'s not working in my home.php, 奇怪的是，当我检查家中任何帖子的post\\u是否在\\u genderant\\u类别中时。php结果保持为true

I want to know the reason for that and how to fix it

post\\u的我的代码是\\u子体\\u类别中的\\u

if ( ! function_exists( \'post_is_in_descendant_category\' ) ) {
    function post_is_in_descendant_category( $cats, $_post = null ) {
        foreach ( (array) $cats as $cat ) {
            // get_term_children() accepts integer ID only
            $descendants = get_term_children( (int) $cat, \'category\' );
            if ( $descendants && in_category( $descendants, $_post ) )
                return true;
        }
        return false;
    }
}

我的插件代码：

function check_category(){  
    global $rtlDir;
    if ( $category_to_check = get_term_by( \'slug\', \'category-3\', \'category\' )){
        if(post_is_in_descendant_category($category_to_check->term_id)){
            $rtlDir = true;
        }else{
            $rtlDir = false;
        }
    }

}
add_filter("wp","check_category");

add_filter("the_post", "check_category");

function check_category($post) {
  // here your code
  global $rtlDir;
  if ( $category_to_check = get_term_by( \'slug\', \'category-3\', \'category\' ) ){
    if( post_is_in_descendant_category($category_to_check->term_id, $post) ){
        $rtlDir = true;
    } else {
        $rtlDir = false;
    }
  }
}