preg_replace正则小笔记

要把
andy/23423.html
替换成
andy.php?id=23423

两种写法

preg_replace("/andy\/([0-9]+)\.html/","andy.php?id=\\1",$data);
preg_replace("'andy/([0-9]+).html'","andy.php?id=$1",$data);
感谢几位兄弟的帮助:)