WHMCS .htaccess剥离.php并忽略一些路径

Question

我目前正在尝试从WHMCS安装中删除.php扩展名。我的.htaccess当前看起来像这样，并完成了工作：

# Ignore admin/manage directory
RewriteRule ^(manage|admin)($|/) - [L]

## BEGIN Strip PHP Extension from URLs ##
Options +FollowSymLinks +MultiViews
RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)\.php [NC]
RewriteRule ^ %1 [R,L,NC]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [L]
## END Strip PHP from URLs ##

### BEGIN - WHMCS managed rules - DO NOT EDIT BETWEEN WHMCS MARKERS ###
<IfModule mod_rewrite.c>
RewriteEngine on    
RewriteBase /

# Redirect directories to an address with slash
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.+[^/])$  $1/ [R]

# Send all remaining (routable paths) through index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Determine and use the actual base
RewriteCond $0#%{REQUEST_URI} ([^#]*)#(.*)\1$
RewriteRule ^.*$ %2index.php [QSA,L]
</IfModule>
### END - WHMCS managed rules - DO NOT EDIT BETWEEN WHMCS MARKERS ###

# Force SSL
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTPS} !=on [NC]
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>

但是，我遇到了与/ knowledgebase之类的特定页面有关的问题，在正常的WHMCS安装中，该页面始终不使用.php扩展名。知识库页面已加载，但是单击文章可将URL更改为以下示例

/knowledgebase/2/Do-you-keep-backups.html

问题在于页面实际上并未更改，并且继续显示文章列表，就好像我只是在/ knowledgebase上一样。因此，我试图从去除.php扩展名的.htaccess重写规则中忽略该路径（例如/ download等）。

我尝试使用RewriteCond %{REQUEST_URI} !^(.*/)?knowledgebase\.php$ [NC]和RewriteCond %{REQUEST_URI} !^(.*/)?knowledgebase$ [NC]无济于事。