PHP：正则表达式处理微博中的话题和对象名

1. $post_content = "@oschina和@twitter在研究用#PHP#的#正则表达式#过滤话题和对象名";
3. $tag_pattern = "/\#([^\#|.]+)\#/";
4. preg_match_all($tag_pattern, $post_content, $tagsarr);
5. $tags = implode(',',$tagsarr[1]);
7. $user_pattern = "/\@([a-zA-z0-9_]+)/";
8. $post_content = preg_replace($user_pattern, '@$程序猿闯子', $post_content );
9. $post_content = preg_replace($tag_pattern, '#$程序猿闯子#', $post_content);

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