.htaccess rewrite knowledgebase to xyz and trim + redirect extension .php or .html w/ trailing slash

[USA_Webmaster]

May you please offer wisdom to help me achieve my desired URL for knowledgebase?

 

• rename knowledgebase to kb
  
• rearrange, so {$kbarticle.urlfriendlytitle} appears before {$kbarticle.id}
  
• hide / remove / trim and or redirect extensions
  
• *trailing slash
  
• *force lowercase
  

* = extra fancy, but still, highly desirable

 

original / stock

http://domain.com/knowledgebase/1/Test.html

 

new (what I currently have with code below)

http://domain.com/kb/Test-1.html

* rearrange and rename knowledge to kb

 

desire

http://domain.com/kb/test-1

*force lowercase, remove extension and rearrange and rename

 

Here is my current code .htaccess:

 

RewriteRule ^kb/[a-z0-9_-]+\-([0-9]+).html$ ./knowledgebase.php?action=displayarticle&id=$1 [L,NC]
RewriteRule ^knowledgebase/([0-9]+)/([^/]*)$ ./knowledgebase.php?action=displaycat&catid=$1 [L,NC]
RewriteRule ^knowledgebase$ ./knowledgebase.php [L,NC]

 

Here is the original stock .htaccess on fresh WHMCS install:

 

RewriteRule ^knowledgebase/([0-9]+)/[a-z0-9_-]+\.html$ ./knowledgebase.php?action=displayarticle&id=$1 [L,NC]
RewriteRule ^knowledgebase/([0-9]+)/([^/]*)$ ./knowledgebase.php?action=displaycat&catid=$1 [L,NC]
RewriteRule ^knowledgebase$ ./knowledgebase.php [L,NC]

 

I've already fired up some template files, like these:

 

• knowledgebasecat.tpl
  
  
• knowledgebasearticle.tpl
  
  
• knowledgebase.tpl
  
  

After I launched up the file, I didn't have to customize that much, and I just cut / paste some code, for example:

 

stock code line #34
<a href="{if $seofriendlyurls}{$WEB_ROOT}/[u]knowledgebase/{$kbcat.id}/{$kbcat.urlfriendlyname}[/u]{else}knowledgebase.php?action=displaycat&catid={$kbcat.id}{/if}">

new code
<a href="{if $seofriendlyurls}{$WEB_ROOT}/[u]kb/{$kbcat.urlfriendlyname}-{$kbcat.id}[/u]{else}knowledgebase.php?action=displaycat&catid={$kbcat.id}{/if}">

 

---

 

sources that helped me out, but didn't get me 100% desired results:

#1 = http://stackoverflow.com/questions/9608366/remove-index-php-from-url-with-htaccess/9619319?noredirect=1#comment64671812_9619319

#2 = https://alexcican.com/post/how-to-remove-php-html-htm-extensions-with-htaccess/