Does anyone know how to make a website editing tool? I am new to this, but I am certified by Train Simple's web technologies online training school, so I understand html, css, and I took their fundamental courses on javascript, but I am very weak in this area. I don't know any php. I want to start making websites for people, but my first client wants to be able to edit his own site. Do professional web developer companies generally have this service? Do they typically discourage clients from editing their own site because of the potential to hurt the optimization of the site?

Any help with a link to an article on how to develop such a site would be very appreciated.