publish\\u post在发布帖子时运行，或者如果帖子已编辑且其状态为“published”。操作函数参数：post ID。

-Plugin API Documentation

我已经将publish\\u post挂钩添加到我正在编写的WordPress插件中。钩子本身调用的函数旨在使用wp\\u update\\u post函数更改几个帖子的类别。

但是，此挂钩不起作用，因为运行wp\\u update\\u post返回的结果始终为0。我的猜测是，运行wp\\u update\\u post会导致另一个钩子实例运行，因为它会重新发布帖子。。。我相信这会带来"...or if it is edited and its status is "published"" 上述声明的一部分。

有没有其他我可以使用的动作挂钩，只有在添加的帖子是全新的且未编辑时才会调用？

<?php
 /* 
 Plugin Name: Category Switcher Plugin
 Plugin URI: http://www.example.com
 Description: When a new post is created this plugin will cause the 
 Version: 0.1
 Author: Me
 License: GPL2 
?>
<?php
class categoryShifter {
  function shiftCategories($post_ID) {

    $maxNumPostsFirstTeir = 4;

    $first_teir_cat = "Fresh News Stories 1";
    $second_teir_cat = "Slightly Dated Stories 2";  

    $firephp = FirePHP::getInstance(true);

    $firephp->info(\'BEGIN: categoryShifter.shiftCategories()\');

    $firephp->log($post_ID, \'post_ID: \');
    $firephp->trace(\'trace to here\');    

    $first_teir_id = categoryShifter::getIDForCategory($first_teir_cat, $firephp); 
    $second_teir_id = categoryShifter::getIDForCategory($second_teir_cat, $firephp);

    $firephp->log($first_teir_id, \'$first_teir_id\');
    $firephp->log($second_teir_id, \'$second_teir_id\');   

    $qPostArgs = array(
      \'numberposts\' => 100,
      \'order\' => \'DESC\', 
      \'orderby\' => \'post_date\',
      \'post_type\' => \'post\',
      \'post_status\' => \'published\', 
      \'category_name\' => $first_teir_cat
    );

    $firstTeirPosts = get_posts($qPostArgs);   
    $firephp->log($firstTeirPosts, \'got posts:\');

    $firephp->log(sizeof($firstTeirPosts), \'sizeof\');


    // NOTE: This appears to work.
    for($i = sizeof($firstTeirPosts)-1; $i > $maxNumPostsFirstTeir-4; $i--) 
    {
      $newCats = array($second_teir_id);
      $editingId = $firstTeirPosts->ID;
      $result = wp_set_post_categories($editingId, $newCats); /* NOTE: Doesn\'t work presently... returns an array with the $second_teir_id in it. */
      $firephp->log($result, \'Result\'); 
    }



    /*
    $my_post = array();
    $my_post[\'ID\'] = 132;
    $my_post[\'post_category\'] = array($second_teir_id);


    $firephp->log(\'Before\', \'Before\'); 
    if(wp_update_post( $my_post ) == 0) {
        $firephp->Error(\'Fatal Error, Post not updated\', \'error\');
    }
    $firephp->log(\'After\', \'After\');
    */
    return $post_ID;
  }


  function getIDForCategory($cat_name, $logger) {
    $logger->Info("Begin: getIDForCategory()");

    $cats = get_categories();      

    $whichCatId = "";

    foreach($cats as $single_cat) {
      if($single_cat->name == $cat_name) {
       $whichCatId = $single_cat->term_id;
       break;
      }
    }
    $logger->Info("End: getIDForCategory()");
    return (int)$whichCatId;
  }
}

/* Hook Post Creation */
/* add_action(\'publish_post\', array(\'categoryShifter\',\'shiftCategories\')); */
add_action(\'wp_insert_post\', array(\'categoryShifter\', \'shiftCategories\'));
?>

我暂时改用wp\\u insert\\u post挂钩。。。但是我仍然无法使用wp\\u set\\u post\\u categories函数来更改帖子的类别。

我知道我可能需要更新这段代码，以便它考虑到帖子的现有类别，并且只修改插件指定的类别，但现在它实际上只是一个alpha。

add_action(\'new_to_publish\', \'your_function\');
add_action(\'draft_to_publish\', \'your_function\');
add_action(\'pending_to_publish\', \'your_function\');

/**
*   Do something when a new book is created
*/
function new_book($post_id, $post, $update) {
    if ($post->post_type == \'book\' && $post->post_status == \'publish\' && empty(get_post_meta( $post_id, \'check_if_run_once\' ))) {
        # New Post

        # Do something here...

        # And update the meta so it won\'t run again
        update_post_meta( $post_id, \'check_if_run_once\', true );
    }
}
add_action( \'wp_insert_post\', \'new_book\', 10, 3 );

/**
*   This is a temporary function to update existing posts with the "check_if_run_once" post meta
*   Access your website logged in as admin and add ?debug to the URL.
*/
function temporary_function() {
    if (current_user_can(\'manage_options\')) {
        $posts = get_posts(array(
            \'post_type\' => \'book\',
            \'posts_per_page\' => -1, // You might need to paginate this depending on how many posts you have
        ));
        foreach($posts as $post) {
            update_post_meta($post->ID, \'check_if_run_once\', true);
        }
    }
}
if (isset($_GET[\'debug\'])) {
    add_action(\'init\', \'temporary_function\');
}

function my_post_new($new_status, $old_status=null, $post=null){
    if ($new_status == "auto-draft"){
        // do stuff here
    }
}
add_action(\'transition_post_status\', \'my_post_new\');

if (!function_exists(\'benyonsFunction\')) {
    function benyonsFunction($postId, $post) {
        if ($post->post_status == "auto-draft") {
            error_log(\'NEW POST!!!\');
        }
    }
}

add_action(\'wp_insert_post\', \'benyonsFunction\', 10, 2);