为什么这个重定向不起作用？

Question

I'm fairly new to Wordpress so not sure what I'm doing wrong. On my Wordpress site, users are able to create custom post types (products). I'm looking to disallow access to a page like this: example.com/post-a-listing by redirecting users to another page if they didn't create at least one product. Here's what I've tried but this isn't working..

  function yoursite_user_has_posts($user_id) {
      $result = new WP_Query(array(
        'author'=>$user_id,
        'post_type'=>'product',
        'post_status'=>'publish',
        'posts_per_page'=>1,
      ));
      return (count($result->posts)!=0);
    }

add_action( 'template_redirect', 'redirect_to_specific_page' );

    function redirect_to_specific_page() {

    if ( is_page('post-a-listing') && ! yoursite_user_has_posts($user_id) ) {

    wp_redirect( 'https://example.com/', 301 ); 
      exit;
        }

Answer 1

The issue for the function is $user_id actually , from where you can get the $user_id with out referencing it?

Use get_current_user_id() inside the function to get the current User ID.

    function redirect_to_specific_page() {
       $user_id = get_current_user_id();
       if ( is_page('post-a-listing') && ! yoursite_user_has_posts($user_id) ) {
       wp_redirect( 'https://example.com/', 301 ); 
       exit;
       }
    }