Php .htaccess一到三个/级别

我需要

重写规则

，接受如下内容：

mysite/courses going to mysite/index.php?page=courses

mysite/courses/add going to mysite/index.php?page=courses&action=add

mysite/courses/edit/3 goint to mysite/index.php?page=courses&action=edit&id=3

目前，我正在使用：

RewriteEngine On
RewriteRule %{REQUEST_FILENAME} !-f
RewriteRule %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI}  !\.(php|html?|jpg|gif|js|css)$
RewriteRule ^([^/]*)/([^/]*)/([^/]*)$ index.php?page=$1&action=$2&id=$3

但是，当我尝试mysite/courses/时，它不起作用

---

关于

我是通过这个.htaccess获得的

RewriteEngine On
RewriteRule %{REQUEST_FILENAME} !-f
RewriteRule %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI}  !\.(php|html?|jpg|gif|js|css)$
RewriteRule ^([^/]*)/?([^/]*)/?([^/]*)$ index.php?page=$1&action=$2&id=$3