PHP：正規表示式處理微博中的話題和物件名

$post_content = "@oschina和@twitter在研究用#PHP#的#正则表达式#过滤话题和对象名";

$tag_pattern = "/#([^#|.]+)#/";
preg_match_all($tag_pattern, $post_content, $tagsarr);
$tags = implode(',',$tagsarr[1]);

$user_pattern = "/@([a-zA-z0-9_]+)/";
$post_content = preg_replace($user_pattern, '@$程序猿闯子', $post_content );
$post_content = preg_replace($tag_pattern, '#$程序猿闯子#', $post_content);