【ワードプレス】管理画面の投稿一覧の各記事にスパム数を表示する方法

functions.php

add_filter("post_row_actions", function($actions, $post){
	if($post->post_status == "publish"){
		$num_comments = wp_count_comments($post->ID);
		$actions['spam'] = sprintf('<a href="%s">' . __('Spam') . '(%s)</a>', sprintf(admin_url('edit-comments.php?comment_status=spam&p=%d'), $post->ID), $num_comments->spam);
	}
	return $actions;
}, 0, 2);