The client already has a relatively popular web site, coded in JS/PHP/ HTML5/CSS3 some years ago. For a variety of reasons they don't want to switch to CMS platforms like WordPress, Wix or Joomla etc.
However they do want to add a blog to their site. I suggested to redirect a blog link of their site to a 3rd party platform, like Blogger. They do not like it either.
So I started to look around for JS/PHP libraries that support blogging, something like phpBB for forums that may be incorporated into almost any site. Unfortunately I couldn't find even a single one. Ghost is the closest thing that I found, but it requests Node.js
Any recommendation would be greatly appreciated.