如何使用str_ireplace（）在发布/保存例程期间过滤帖子内容？

Question

I'm trying to create a function that does a text replacement on the post content when its saved (the_content).

The stub function is below, but how do I obtain a reference to the post content, then return the filtered content back to the "publish_post" routine?

However, my replacement is either not working and/or not passing the updated post_content to the publish function. The values never get replaced.

function my_function() {
    global $post;
    $the_content = $post->post_content;
    $text = " test ";
    $post->post_content = str_ireplace($text, '<b>'.$text.'</b>', $the_content  );
    return $post->post_content;
    }
add_action('publish_post', 'my_function');

Answer 1

Probably easier to do something like this:

function my_function($post) {
  $content = str_ireplace(" test ", '<b>'.$text.'</b>', $post->content);

  return $content;
}

Less focus was on the interior of the function, but the idea is that you pass the object to the function in the () then call the directly rather than globalizing the value. It should be more direct that way.