PHP注意：尝试在第7行的wp-contnet / themes / my-theme / sidebar.php中获取非对象的属性

Question

启用debug.log后，我收到此错误-

  

PHP注意：尝试在第7行的wp-contnet / themes / my-theme / sidebar.php中获取非对象的属性

第7行是–

<?php $this_post = $post;$category = get_the_category(); $category = $category[0]; $category = $category->cat_ID;$posts = get_posts('numberposts=3&offset=0&orderby=rand&order=DESC&category='.$category);$count = 0;foreach ( $posts as $post ) {if ( $post->ID == $this_post->ID || $count == 3) {unset($posts[$count]);}else{$count ++;}}?>

有什么建议吗？ 谢谢