Php htaccess 301重定向到语言子目录

我更改网站url以接受不同的语言，因此，我将网站内容移动为默认语言

从：www.site.com到：www.site.com/en

现在，我从php执行重定向，如果

$\u GET['lang']

不存在或

$\u GET['path']

存在，则重定向到site.com/en或site.com/en/（path），但我认为从根目录到文件夹的301重定向更好

我怎么写这个规则

这是我的htaccess文件：

RewriteEngine on
RewriteBase /

RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

RewriteRule ^download/(.*)$ php/download.php?id=$1 [L]

# with language
RewriteRule ^([a-z]{2})/p/(.*)$ single.php?lang=$1&hash=$2 [L]
RewriteRule ^([a-z]{2})$ index.php?lang=$1 [L,NC,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^?]*)$ index.php?path=$1 [NC,L,QSA]

---

谢谢

如果我的理解是正确的，这将满足您的要求

已更新。htaccess

（带注释以便于理解）

---

需要澄清一下。URL的示例是什么，以及应该如何处理这些URL。

RewriteEngine on
RewriteBase /

# If the hostname is a `www` subdomain, redirect to the parent domain
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

# Internal rewrite of Download request URL to download PHP script
RewriteRule ^download/(.*)$ php/download.php?id=$1 [L]

# If request path is just root `/` (redirect to default language site)
RewriteRule ^$  /en [R=301,L]

# If request path is a language code,
# internally rewrite to index.php with `lang` query paramater
RewriteRule ^([a-z]{2})$ index.php?lang=$1 [L,NC,QSA]

# If request path begins with lang code and has a hash segment,
# internally rewrite to single.php with `lang` and `hash` query parameters
RewriteRule ^([a-z]{2})/p/(.*)$ single.php?lang=$1&hash=$2 [L]

# If request path begins with lang code and has additional segements
RewriteRule ^([a-z]{2})/(.*)$ index.php?lang=$1&path=$2 [NC,L,QSA]

# For every other request path not having a language code,
# if path is not an existing file or directory,
# redirect to a path prefixing default lang code before the requested path
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^?]*)$  /en/$1 [NC,L,R=301]